Skylark Science 8 1 Model Papers Model Paper No-1 1 st Term (Units 1 - 4) Time Allowed: 2 Hours Total Marks: 100 Part -A (Multiple Choice Questions) Fifteen (15) Multiple Choice Questions (MCQs) are given in this part. All questions carry equal marks. (15×2) 1. What is the term for the part of the nervous system that includes the brain and spinal cord? (a) central nervous system (b) dorsal nervous system (c) peripheral nervous system (d) lateral nervous system 2. The basic working unit of our nervous system is the: (a) neuron (b) nerve (c) brain (d) nephron 3. Nerves in our hand receive the message of pain and send it to the: (a) brain (b) spinal cord (c) medulla (d) cerebrum 4. The component of a chromosome that controls heredity: (a) protein (b) DNA (c) RNA (d) nucleus 5. In dogs, the chromosome number is 78. How many chromosomes are present in the
Transcript
Skylark Science 8 1 Model PapersModel Paper No-1
1st Term (Units 1 - 4) Time Allowed: 2 Hours Total Marks: 100
Part -A (Multiple Choice Questions) Fifteen (15) Multiple Choice Questions (MCQs) are given in this part. All questions carry equal marks.
(15×2)1. What is the term for the part of the nervous
system that includes the brain and spinal cord? (a) central nervous system (b) dorsal nervous system (c) peripheral nervous system (d) lateral nervous system
2. The basic working unit of our nervous system is
the:(a) neuron (b) nerve(c) brain (d) nephron
3. Nerves in our hand receive the message of pain
and send it to the:(a) brain (b) spinal cord(c) medulla (d) cerebrum
4. The component of a chromosome that controls
heredity:(a) protein (b) DNA(c) RNA (d) nucleus
5. In dogs, the chromosome number is 78. How
many chromosomes are present in the dog's
gamete (sex cell)?(a) 39 (b) 40(c) 46 (d) 78
6. The passing of characteristics from onegeneration to another:(a) selective breeding (b) genetic engineering(c) heredity (d) population
Skylark Science 8 2 Model Papers7. Insulin is a harmone to control:
(a) sugar level (b) blood pressure(c) hepatitis (d) salt level
8. Genetic engineering is used to produce:(a) large quantities of medicine (b) viruses (c) genes (d) bacteria
9. The ability of a living body to resist against a
Q.1. Fill in the blanks. (5×2)1. The largest part of our brain is _______2. Genes are the part of _______3. Vaccines are made from _______causing germs.4. Ozone protects us from _______5. The process in which heat from the Earth is
absorbed by the gases in atmosphere is called ____Q.2 Answer the following questions in short. (10 x 3)1. What is a neuron?2. How is our spinal cord important?3. What are the daughter cells?4. Which cell is called a parent cell?5. What is biotechnology?6. Briefly describe the relationship between
chromosomes, DNA and genes.7. What is air pollution?8. How is deforestation affecting the environment?9. What is genetic engineering?10. What is solid waste management?Q.3. Answer questions in detail. (any five) (5 × 6)1. Describe the structure and functions of human
brain.2. Describe the basis of heredity.3. How can biotechnology help farmers to reduce the
use of insecticides and herbicides?4. Write a detailed note on acid rain.5. Describe how can three R's, i.e Reduce, Reuse and
Recycling help to save the Earth? 6. How are characteristics passed on to offspring?
Explain. 7. How is gene introduced into a bacterium? Explain
its process in making human protein.
Skylark Science 8 4 Model PapersModel Paper No-2
1st Term (Units 1 - 4) Time Allowed: 2 Hours Total Marks: 100
Part -A (Multiple Choice Questions) Fifteen (15) Multiple Choice Questions (MCQs) are given in this part. All questions carry equal marks.
(15×2)1. Nerves in our hand receive the message of pain
and send it to the:(a) brain (b) spinal cord(c) medulla (d) cerebrum
Q.1. Fill in the blanks. (5×2)1. Our heart beat is an _______ action.2. The process of producing new cells is called _____3. The extra DNA reing in a bacterium is called ____4. Any substance in the environment which is bad for
health is called _______5. The largest part of our brain is _______Q.2 Answer the following questions in short. (10 × 3)1. Define excretion.2. Why are kidneys essential for our life?3. What is heredity?4. What is DNA?5. Name the nitrogen bases present in DNA.6. What food products are made from biotechnology?7. What are 3 Rs?8. Define conservation of resources.9. Which cell is called a parent cell?10. Briefly describe the relationship between
chromosomes, DNA and genes.Q.3. Answer the questions in detail. (any five) (5 × 6)1. Write a note on reflex action.2. Differentiate between mitosis and meiosis.3. Write a note on genetic modification.4. What is air pollution? Name of few air pollutants.
Also describe sulphur dioxide.5. Describe the structure and functions of human
brain.6. Describe the basis of heredity.7. How can biotechnology help farmers to reduce the
use of insecticides and herbicides?
Skylark Science 8 7 Model PapersModel Paper No-3
1st Term (Units 1 - 4) Time Allowed: 2 Hours Total Marks: 100
Part -A (Multiple Choice Questions) Fifteen (15) Multiple Choice Questions (MCQs) are given in this part. All questions carry equal marks.
(15×2)1. Which part of our excretory system work like a
2. Which nerves arise from the brain?(a) cranial (b) spinal(c) auto (d) semi
3. What is the term for the part of the nervous
system that includes the brain and spinal cord? (a) Central nervous system (b) Dorsal nervous system (c) peripheral nervous system (d) Lateral nervous system
4. The basic substance of heredity is:(a) Deoxy ribonucleic acid(b) protein (c) vitamin A(d) fatty acid
5. Who is known as the "Father of Genetics" ?
(a) Charles Darwin (b) Gregor Mendel(c) Newton (d) Galileo
6. The component of a chromosome that controls
heredity:(a) protein (b) DNA(c) RNA (d) nucleus
Skylark Science 8 8 Model Papers7. In which process a DNA molecule makes its
copy? (a) DNA replication (b) DNA copying(c) genetic duplication (d) genetic combination
8. It can save millions of children from blindness:
(a) golden tomato (b) golden rice(c) red potato (d) papaya
9. Insulin is a harmone to control:(a) sugar level (b) blood pressure(c) hepatitis (d) salt level
10. How can we get rid of excess carbon dioxide in
the atmosphere? (a) by planting more trees (b) by drinking less water (c) by breathing less often (d) by burning more wood
Skylark Science 8 9 Model Papers15. The passing of characteristics from one
generation to another:(a) selective breeding (b) genetic engineering(c) heredity (d) population
Part -B (Open Ended Questions) Marks: 70Q.1. Fill in the blanks. (5×2)1. The most important part of human body is _______2. Meiosis completes in _______ steps.3. Chromosomes are made up of protein and _______4. The process in which heat from the Earth is
absorbed by the gases in atmosphere is called ____5. Ozone protects us from _______Q.2 Answer the following question in short. (10 × 3)1. What is the composition of our urine?2. What is a neuron?3. What does determine the colour of flowers in
plants?4. What are the daughter cells?5. What is genetic engineering?6. What is biotechnology?7. What is solid waste management?8. What is air pollution?9. How is our spinal cord important?10. How is deforestation affecting the environment?Q.3. Answer the questions in detail. (any five)
(5×6)1. What are some symptoms of kidney diseases? Also
explain the process of dialysis. 2. How are characteristics passed on to offspring?
Explain. 3 How is gene introduced into a bacterium? Explain
its process in making human protein. 4. Describe how can three R's, i.e Reduce, reuse and
recycling help to save the Earth?
Skylark Science 8 10 Model Papers5. Write a detailed note on acid rain.6. Describe the basis of heredity.7. Write a detailed note on acid rain.
Skylark Science 8 11 Model PapersModel Paper No-4
1st Term (Units 1 - 4) Time Allowed: 2 Hours Total Marks: 100
Part -A (Multiple Choice Questions) Fifteen (15) Multiple Choice Questions (MCQs) are given in this part. All questions carry equal marks.
(15×2)1. Our urine is mostly:
(a) carbon dioxide (b) water(c) urea (d) salts
2. What is the term for the part of the nervous
system that includes the brain and spinal cord? (a) Central nervous system (b) Dorsal nervous system (c) peripheral nervous system (d) Lateral nervous system
4. The dividing cell is called:(a) daughter cell (b) brother cell(c) parent cell (d) mother cell
5. The component of a chromosome that controls
heredity:(a) protein (b) DNA(c) RNA (d) nucleus
6. The basic substance of heredity is:(a) Deoxy ribonucleic acid (b) protein (c) vitamin A (d) fatty acid
7. Genetic engineering is:
Skylark Science 8 12 Model Papers(a) plastic surgery(b) addition or removal of genes(c) study of cells (d) study of algae
8. Insulin is a harmone to control:(a) sugar level (b) blood pressure(c) hepatitis (d) salt level
9. In which process a DNA molecule makes its
copy? (a) DNA replication (b) DNA copying(c) genetic duplication (d) genetic combination
10. A natural phenomenon that becomes harmful
due to pollution is:(a) global warming (b) ecological balance(c) greenhouse effect (d) acid rain
11. A major source of carbon monoxide (CO) is:
(a) plants (b) motor vehicles(c) refrigeration (d) animals
12. How can we get rid of excess carbon dioxide in
the atmosphere? (a) by planting more trees (b) by drinking less water (c) by breathing less often (d) by burning more wood
13. Most of the Earth's animals live in:(a) rivers (b) mountains(c) forests (d) deserts
14. Genetic engineering is used to produce:(a) large quantities of medicine (b) viruses (c) genes (d) bacteria
Skylark Science 8 13 Model Papers15. In dogs, the chromosome number is 78. How
many chromosomes are present in the dog's
gamete (sex cell)?(a) 39 (b) 40(c) 46 (d) 78
Part -B (Open Ended Questions) Marks: 70Q.1. Fill in the blanks. (5×2)1. Genes are the part of _______2. Our heart beat is an _______ action.3. Vaccines are made from _______causing germs.4. The extra DNA reing in a bacterium is called
_______5. Any substance in the environment which is bad for
health is called _______Q.2 Answer the following question in short. (10 × 3)1. Why are kidneys essential for our life?2. Define excretion.3. What is the composition of our urine?4. Which cell is called a parent cell?5. What is heredity?6. What is DNA?7. Briefly describe the relationship between
chromosomes, DNA and genes.8. Name the nitrogen bases present in DNA.9. What are 3 Rs?10. Define conservation of resources.Q.3. Answer the questions in detail. (any five)(5 × 6)1. Describe the basis of heredity.2. Write a note on reflex action.3. How can biotechnology help farmers to reduce the
use of insecticides and herbicides?4. Write a note on genetic modification.
Skylark Science 8 14 Model Papers5. What is air pollution? Name of few air pollutants.
Also describe sulphur dioxide.6. Describe the structure and functions of human
brain.7. Differentiate between mitosis and meiosis.
Skylark Science 8 15 Model PapersModel Paper No-1
2nd Term (Units 5 - 8) Time Allowed: 2 Hours Total Marks: 100
Part -A (Multiple Choice Questions) Fifteen (15) Multiple Choice Questions (MCQs) are given in this part. All questions carry equal marks. (15 x
2)1. In a chemical equation, the number written in
front of the chemical formula is:(a) product (b) co-efficient(c) equation (d) reactant
2. A balanced chemical equation is a directpresentation of the: (a) Law of conservation of mass (b) Law of conservation of energy (c) Law of conservation of momentum (d) an ideal gas law
3. What type of chemical reaction absorbs energy
and requires energy to start?(a) endothermic (b) exothermic(c) addition (d) decomposition
4. A common property of alkalis is a:(a) sour taste (b) sweet taste(c) bitter taste (d) salty taste
5. Acid and alkalis can cause some days to change
colour there dyes are called:(a) solutions (b) mixtures(c) indicators (d) solvents
6. Neutralization can be described as:(a) an acid and alkali cancelling each other out (b) an acid becoming clearer in colour. (c) salt dissolving in water (d) bubbles of gas appearing
Skylark Science 8 16 Model Papers7. The unit of force is:
9. When two equal forces act on a body, in opposite
directions, the net force is equal to: (a) the sum of the individual forces (b) zero (c) difference between the two forces (d) an individual force
10. A comparison of a certain quantity with astandard is called:(a) system international (b) measurement(c) description (d) evaporation
11. Which part of a unit is centi?(a) one thousand(b) one thousandth(c) one hundredth (d) one tenth
12. To convert from smaller to larger units, we:
(a) divide (b) multiply(c) add (d) subtract
13. Which of the following is the most accurate way
of showing neutralization? (a) acid + base neutral solution (b) acid + base salt + water (c) acid + base sodium chloride + hydrogen (d) there is no reaction between acids and alkalis
14. In liquids, the pressure:(a) increases with depth (b) decreases with depth
Skylark Science 8 17 Model Papers(c) remains same at all depths(d) sometimes increases sometimes decreases
15. Callipers are usually used to measure:(a) mass (b) time(c) volume (d) length
Part -B (Open Ended Questions) Marks: 70Q.1. Fill in the blanks. (5×2)1. Chemical changes are usually called _______2. Acids react with metals and produce _______ gas.3. Atmospheric pressure is measured by a device
called _______4. The SI unit of volume is _______5. A quantity which can be measured is called a ____Q.2 Answer the following question in short. (10 × 3)1. Define a chemical reaction.2. Define a chemical equation.3. What is the difference between an acid and an
alkali?4. Which acid is called the king of chemicals?5. Why can horses not move easily in sandy soil but
camels can?6. Why is the pressure greater under the high heel of a
lady’s shoe than the pressure under the flat sole?7. What do we mean by prefixes?8. Name a few physical quantities and their units.9. How does a bicycle pump work?10. What is a sand clock or an hour glass?Q.3. Answer the questions in detail. (any five)(5 × 6)1. Explain the re-arrangement of atoms in chemical
reactions with examples.
Skylark Science 8 18 Model Papers2. Write properties of acids. Also write uses of some
common acid.3. Describe a few applications of hydraulics.4. Why it is desirable for scientists to use the SI units
in their work? Explain. 5. Define mass. What is its unit? How can we measure
the mass of an object? 6. How are salts formed and how are they important to
us? 7. What is the atmospheric pressure? Explain it with
examples.
Skylark Science 8 19 Model PapersModel Paper No-2
2nd Term (Units 5 - 8) Time Allowed: 2 Hours Total Marks: 100
Part -A (Multiple Choice Questions) Fifteen (15) Multiple Choice Questions (MCQs) are given in this part. All questions carry equal marks.
(15×2)1. What type of chemical reaction absorbs energy
and requires energy to start?(a) endothermic(b) exothermic(c) addition (d) decomposition
2. 2 Mg + O2 ____________(a) Mg2O (b) MgO2
(c) Mg2O2 (d) 2MgO3. The chemical equation: 2H2 + O2 H2 O:
4. Neutralization can be described as:(a) an acid and alkali cancelling each other out (b) an acid becoming clearer in colour. (c) salt dissolving in water (d) bubbles of gas appearing
5. Which of the following is the most accurate way
of showing neutralization? (a) acid + base neutral solution (b) acid + base salt + water (c) acid + base sodium chloride + hydrogen (d) there is no reaction between acids and alkalis
Skylark Science 8 20 Model Papers6. Sodium hydroxide and calcium hydroxide are:
(a) alkalis (b) acids(c) salts (d) indicators
7. When two equal forces act on a body, in opposite
directions, the net force is equal to: (a) the sum of the individual forces (b) zero (c) difference between the two forces (d) an individual force
8. In liquids, the pressure:(a) increases with depth (b) decreases with depth (c) remains same at all depths (d) sometimes increases sometimes decreases
9. When pressure is applied on a liquid, it gets
transmitted in all directions. This law was given
by:(a) Newton (b) Edison(c) Pascal (d) James Watt
10. To convert from smaller to larger units, we:
(a) divide (b) multiply(c) add (d) subtract
11. Callipers are usually used to measure:(a) mass (b) time(c) volume (d) length
12. A meniscus is the curved surface of a:(a) metal (b) gas(c) solid (d) liquid
13. A balanced chemical equation is a directpresentation of the: (a) Law of conservation of mass
Skylark Science 8 21 Model Papers(b) Law of conservation of energy(c) Law of conservation of momentum(d) an ideal gas law
14. Acid and alkalis can cause some days to change
colour there dyes are called:(a) solutions (b) mixtures(c) indicators (d) solvents
Part -B (Open Ended Questions) Marks: 70Q.1. Fill in the blanks. (5×2)1. The substances that react together are called _____2. The pH of common salt is _______3. The amount of force exerted on a given area is ___4. A number and a _______ are two parts of the
measurement.5. Chemical changes are usually called _______Q.2 Answer the following question in short. (10 x 3)1. What does a balanced chemical equation show?2. What is an exothermic reaction?3. What is pH?4. Define neutralization.5. Define hydraulics.6. Define pneumatics.7. Name three instruments used to measure length.8. Define a cuboid.9. Which acid is called the king of chemicals?10. Why is the pressure greater under the high heel of a
lady’s shoe than the pressure under the flat sole?
Skylark Science 8 22 Model PapersQ.3. Answer the questions in detail. (any five)
(5×6)1. Explain the law of conservation of mass through an
activity.2. Describe the range of pH as indicated on the pH
scale.3. Write a note on aerosols.4. Write a note on time and its measurement.5. Explain the re-arrangement of atoms in chemical
reactions with examples.6. Write properties of acids. Also write uses of some
common acid.7. Describe a few applications of hydraulics.
Skylark Science 8 23 Model PapersModel Paper No-3
2nd Term (Units 5 - 8) Time Allowed: 2 Hours Total Marks: 100
Part -A (Multiple Choice Questions) Fifteen (15) Multiple Choice Questions (MCQs) are given in this part. All questions carry equal marks. (15 x 2)1. The following reaction is: 2H2O + Heat
2H2+O2(a) an exothermic reaction(b) an endothermic reaction(c) a simple reaction (d) a complex reaction
9. The unit of force is:(a) Pascal (b) Newton(c) Farad (d) Ampere
10. The space occupied by matters called its:(a) mass (b) volume(c) weight (d) temperature
11. A meniscus is the curved surface of a:(a) metal (b) gas(c) solid (d) liquid
12. A comparison of a certain quantity with astandard is called:(a) system international(b) measurement(c) description (d) evaporation
13. To convert from smaller to larger units, we:
(a) divide (b) multiply(c) add (d) subtract
14. When two equal forces act on a body, in opposite
directions, the net force is equal to: (a) the sum of the individual forces (b) zero (c) difference between the two forces (d) an individual force
Skylark Science 8 25 Model Papers15. Neutralization can be described as:
(a) an acid and alkali cancelling each other out (b) an acid becoming clearer in colour. (c) salt dissolving in water (d) bubbles of gas appearing
Part -B (Open Ended Questions) Marks: 70Q.1. Fill in the blanks. (5×2)1. If energy is absorbed in a chemical reaction them it
is an _______2. Milk of magnesia (an antacid syrup) contains an
______3. Pascal (Pa) is the unit of _______4. A quantity which can be measured is called a ____5. The SI unit of volume is _______Q.2 Answer the following question in short. (10 x 3)1. How are endothermic reactions important for us?
Give two examples.2. Define a chemical reaction.3. Why should we not touch unknown chemicals?4. What is the difference between an acid and an
alkali?5. How does a bicycle pump work?6. Why can horses not move easily in sandy soil but
camels can?7. What is a sand clock or an hour glass?8. What do we mean by prefixes?9. Define a chemical equation.10. Name a few physical quantities and their units.Q.3. Answer the questions in detail. (Any five) (5 × 6)1. Define a balanced chemical equation. Explain the
balancing of chemical equations with examples.
Skylark Science 8 26 Model Papers2. How are salts formed and how are they important to
us? 3. What is the atmospheric pressure? Explain it with
examples. 4. Define mass. What is its unit? How can we measure
the mass of an object? 5. Why it is desirable for scientists to use the SI units
in their work? Explain. 6. Write properties of acids. Also write uses of some
common acids. 7. Why it is desirable for scientists to use the SI units
in their work? Explain.
Skylark Science 8 27 Model PapersModel Paper No-4
2nd Term (Units 5 - 8) Time Allowed: 2 Hours Total Marks: 100
Part -A (Multiple Choice Questions) Fifteen (15) Multiple Choice Questions (MCQs) are given in this part. All questions carry equal marks. (15 x
2)1. 2 Mg + O2 ____________
(a) Mg2O (b) MgO2
(c) Mg2O2 (d) 2MgO2. In a chemical equation, the number written in
front of the chemical formula is:(a) product (b) co-efficient(c) equation (d) reactant
3. The following reaction is: 2H2O + Heat 2H2+O2(a) an exothermic reaction(b) an endothermic reaction(c) a simple reaction (d) a complex reaction
4. Which of the following is the most accurate way
of showing neutralization? (a) acid + base neutral solution (b) acid + base salt + water (c) acid + base sodium chloride + hydrogen (d) there is no reaction between acids and alkalis
5. A common property of alkalis is a:(a) sour taste (b) sweet taste(c) bitter taste (d) salty taste
6. Hydrochloric acid has a pH of 1. If just enough
sodium hydroxide was added to neutralise some
of the acid, the final pH would be:(a) 1 (b) 7
(c) 5 (d) 9
Skylark Science 8 28 Model Papers7 In liquids, the pressure:
(a) increases with depth (b) decreases with depth (c) remains same at all depths (d) sometimes increases sometimes decreases
8. The unit of force is:(a) Pascal (b) Newton(c) Farad (d) Ampere
9. The particles suspended in the air are known as:
15. Acid and alkalis can cause some days to change
colour there dyes are called:(a) solutions (b) mixtures(c) indicators (d) solvents
Skylark Science 8 29 Model PapersPart -B (Open Ended Questions) Marks: 70Q.1. Fill in the blanks. (5×2)1. Acids react with metals and produce _______ gas.2. The substances that react together are called _____3. Atmospheric pressure is measured by a device
called _______4. The amount of force exerted on a given area is ___5. A number and a _______ are two parts of the
measurement.Q.2 Answer the following question in short. (10×3)1. What is an exothermic reaction?2. What does a balanced chemical equation show?3. How are endothermic reactions important for us?
Give two examples.4. Which acid is called the king of chemicals?5. What is pH?6. Define neutralization.7. Why is the pressure greater under the high heel of a
lady’s shoe than the pressure under the flat sole?8. Define hydraulics.9. Name three instruments used to measure length.10. Define a cuboid.Q.3. Answer the questions in detail. (any five)(5 × 6)1. Write properties of acids. Also write uses of some
common acids.3. Explain the law of conservation of mass through an
activity.4. Describe a few applications of hydraulics.5. Write a note on aerosols.6. Write a note on time and its measurement.7. Explain the re-arrangement of atoms in chemical
reactions with examples. 8. Describe the range of pH as indicated on the pH
scale.
Skylark Science 8 30 Model PapersModel Paper No-1 3rd Term (Units 9 - 12)
Time Allowed: 2 Hours Total Marks: 100
Part -A (Multiple Choice Questions) Fifteen (15) Multiple Choice Questions (MCQs) are given in this part. All questions carry equal marks.(15 × 2)1. The decrease in an object’s volume due to
5. The centre of the lens is called:(a) principal focus (b) optical centre(c) centre of curvature (d) principal axis
6. The focal length (f) is the distance:(a) between optical centre and principal focus (b) between principal focus and centre of curvature (c) between principal focus F and 2F (d) between optical centre and centre of curvature
Skylark Science 8 31 Model Papers7. The process by which a generator produces
8. The branch of science that deals with a study of
flow and control of electrons:(a) genetics (b) electronics(c) hydraulics (d) pneumatics
9. The electronic component which resembles to a
battery in its function:(a) diode (b) resistor(c) capacitor (d) transistor
10. Which space project is a very good example of
cooperation? (a) space shuttle project (b) The international space station (c) exploration of Mars (d) tourism in space
11. A telescope that uses mirrors to gather light
from stars to form images: (a) a refracting telescope (b) a reflecting telescope (c) The Hubble space Telescope (d) a radio telescope
12. First space station Salyut was launched in 1971
by: (a) United States of America (b) United Kingdom (c) Soviet Union(d) Japan
13. When a converging lens forms image of 2F, the
object is:(a) an infinity (b) between F and 2F
(c) beyond 2 F (d) on 2F
Skylark Science 8 32 Model Papers14. A device that changes the voltage of alternating
current is a:(a) transformer (b) motor(c) generator (d) galvanometer
15. The first space shuttle in space was:(a) Discovery (b) Columbia(c) Atlantis (d) Challenger
Part -B (Open Ended Questions) Marks: 70Q.1. Fill in the blanks. (5×2)1. When _______ is added to solids, liquids or gases
they increase in size.2. A lens that spreads light apart is a _______ lens.3. An English scientist, _______ discovered that a
magnet can produce electricity in a wire. 4. Scientists discover and explore the _______ by
means of space technology.5. Scientists collect information about the composition
and temperature of a star by using a _______Q.2 Answer the following question in short. (10 × 3)1. Define heat.2. Describe the working of fire alarm.3. Define a lens.4. What are two major types of lenses?5. What is a dynamo?6. Define electromagnetic induction.7. How do scientists observe objects in space from the
Earth?8. For what purposes space shuttles are used?9. Differentiate between hardware and software.10. How do astronauts sleep in the space station?
Skylark Science 8 33 Model PapersQ.3. Answer the questions in detail. (any five)(5 × 6)1. Describe some applications of thermal expansion
and contraction of solids.2. Describe a few uses of lenses in our everyday life.3. Explain the structure and working of a generator.4. How do astronauts live and work in space?5. Give examples of new technologies used on the
Earth that have developed as a result of thedevelopment of space technology.
6. Compare a simple camera and the human eye.7. What types of energy are being used in power
stations?
Skylark Science 8 34 Model PapersModel Paper No-2 3rd Term (Units 9 - 12)
Time Allowed: 2 Hours Total Marks: 100
Part -A (Multiple Choice Questions) Fifteen (15) Multiple Choice Questions (MCQs) are given in this part. All questions carry equal marks.(15 × 2)1. When a substance is heated, its molecules absorb
energy and: (a) start vibrating slow (b) stops moving (c) start moving faster (d) jump out of the substance
2. Water has maximum volume at:(a) 4°C (b) 0°C(c) 1°C (d) 100°C
3. What property of a substance changes when it is
heated?(a) volume (b) weight(c) mass (d) melting point
4. The focal length (f) is the distance:(a) between optical centre and principal focus (b) between principal focus and centre of curvature (c) between principal focus F and 2F (d) between optical centre and centre of curvature
5. When a converging lens forms image of 2F, the
object is:(a) an infinity (b) between F and 2F(c) beyond 2 F (d) on 2F
6. A concave lens is often used to correct:(a) short-sightedness (b) long-sightedness(c) cataract (d) blindness
Skylark Science 8 35 Model Papers7. The electronic component which resembles to a
battery in its function:(a) diode (b) resistor(c) capacitor (d) transistor
8. A device that changes the voltage of alternating
current is a:(a) transformer (b) motor(c) generator (d) galvanometer
9. A diode is a:(a) rectifier (b) input device(c) output device (d) storage device
10. First space station Salyut was launched in 1971
by:(a) United States of America(b) United Kingdom (c) Soviet Union(d) Japan
11. The first space shuttle in space was:(a) Discovery (b) Columbia(c) Atlantis (d) Challenger
12. Astronauts in free fall experience:(a) gravity (b) weightlessness(c) mass loss (d) microgravity
13. Which of the following substances expand the
most by providing equal amount of heat?(a) water (b) air(c) iron (d) brass
14. The centre of the lens is called:(a) principal focus (b) optical centre(c) centre of curvature (d) principal axis
15. The branch of science that deals with a study of
flow and control of electrons:(a) genetics (b) electronics(c) hydraulics (d) pneumatics
Q.1. Fill in the blanks. (5×2)1. An electric iron uses a _______ strip to work.2. We can use a _______ lens to correct short-
sightedness. 3. Thermal power stations burn _______ to produce
electricity.4. Scientists frequently use _______ to observe objects
in space.5. When _______ is added to solids, liquids or gases
they increase in size.Q.2 Answer the following question in short. (10 × 3)1. Why are expansion gaps provided in the rail tracks?2. At what temperature water has maximum volume?3. What is the principal axis of a lens?4. What is short-sightedness?5. Define electronics.6. What is rectification?7. Define space technology.8. Define microgravity.9. What are two major types of lenses?10. Define electromagnetic induction.Q.3. Answer the questions in detail. (any five)
(5×6)1. Write down three effects of expansions and
contraction. How are these effects overcome? 2. What are the defects of vision? How can they be
corrected? Also make diagrams to support youranswer.
3. Describe the basic components of an electronicsystem.
4. Write a note on spacecrafts.
Skylark Science 8 37 Model Papers5. Describe some applications of thermal expansion
and contraction of solids.6. Describe a few uses of lenses in our everyday life.7. Explain the structure and working of a generator.
Skylark Science 8 38 Model PapersModel Paper No-3
3rd Term (Units 9-12) Time Allowed: 2 Hours Total Marks: 100
Part -A (Multiple Choice Questions) Fifteen (15) Multiple Choice Questions (MCQs) are given in this part. All questions carry equal marks. (15
× 2)1. The unit of heat energy is:
(a) Newton (b) Joule(c) Kelvin (d) Ampere
2. What property of a substance changes when it is
heated?(a) volume (b) weight(c) mass (d) melting point
3. The decrease in an object’s volume due tochange in heat:(a) Thermal expansion (b) Thermal contraction(c) condensation (d) evaporation
4. What type of image is formed on the retina of
your eye?(a) real and inverted (b) real and erect(c) virtual and inverted (d) virtual and erect
5. A concave lens is often used to correct:(a) short-sightedness (b) long-sightedness(c) cataract (d) blindness
10. Very slight amount of gravity felt while in orbit
is called:(a) minor gravity (b) microgravity(c) macrogravity (d) gravitational force
11. Astronauts in free fall experience:(a) gravity (b) weightlessness(c) mass loss (d) microgravity
12. Which space project is a very good example of
cooperation? (a) space shuttle project (b) The international space station (c) exploration of Mars (d) tourism in space
13. First space station Salyut was launched in 1971
by: (a) United States of America (b) United Kingdom (c) Soviet Union(d) Japan
14. The electronic component which resembles to a
battery in its function:(a) diode (b) resistor(c) capacitor (d) transistor
15. The focal length (f) is the distance:(a) between optical centre and principal focus
Skylark Science 8 40 Model Papers(b) between principal focus and centre of curvature(c) between principal focus F and 2F(d) between optical centre and centre of curvature
Part -B (Open Ended Questions) Marks: 70Q.1. Fill in the blanks. (5×2)1. Water _______ when heated from 0°C to 4°C.2. There is a _________ lens in the human eye.3. A generator uses _________ of a magnet or coil of
wire to generate electricity. 4. Scientists collect information about the composition
and temperature of a star by using a _______ 5. Scientists discover and explore the _______ by
means of space technology.Q.2 Answer the following question in short. (10×3)1. What does the word thermometer mean?2. Define heat.3. How can we correct the long-sightedness?4. Define a lens.5. Differentiate between hardware and software.6. What is a dynamo?7. How do astronauts sleep in the space station?8. How do scientists observe objects in space from the
Earth?9. Describe the working of fire alarm.10. For what purposes space shuttles are used?Q.3. Answer the questions in detail. (any five) (5 × 6)1. What is a bimetallic strip and how is it used in
electric irons and fire alarms?2. Compare a simple camera and the human eye.3. What types of energy are being used in power
stations?
Skylark Science 8 41 Model Papers4. Give examples of new technologies used on the
Earth that have developed as a result of thedevelopment of space technology.
5. How do astronauts live and work in space?6. Describe a few uses of lenses in our everyday life.7. How do astronauts live and work in space?
Skylark Science 8 42 Model PapersModel Paper-4 3rd Term (Units 9-12)
Time Allowed: 2 Hours Total Marks: 100
Part -A (Multiple Choice Questions) Fifteen (15) Multiple Choice Questions (MCQs) are given in this part. All questions carry equal marks.(15 x 2)1. Water has maximum volume at:
(a) 4°C (b) 0°C(c) 1°C (d) 100°C
2. The decrease in an object’s volume due tochange in heat:(a) Thermal expansion (b) Thermal contraction(c) condensation (d) evaporation
3. The unit of heat energy is:(a) Newton (b) Joule(c) Kelvin (d) Ampere
4. When a converging lens forms image of 2F, the
object is:(a) an infinity (b) between F and 2F(c) beyond 2 F (d) on 2F
9. It can contain thousands of diodes andtransistors on a chip of silicon:(a) a vacuum tube (b) an integrated circuit(c) a fuse (d) a webcam
10. The first space shuttle in space was:(a) Discovery (b) Columbia(c) Atlantis (d) Challenger
11. Which space project is a very good example of
cooperation? (a) space shuttle project (b) The international space station (c) exploration of Mars (d) tourism in space
12. Very slight amount of gravity felt while in orbit
is called:(a) minor gravity (b) microgravity(c) macrogravity (d) gravitational force
13. A telescope that uses mirrors to gather light
from stars to form images: (a) a refracting telescope (b) a reflecting telescope (c) The Hubble space Telescope (d) a radio telescope
14. The branch of science that deals with a study of
flow and control of electrons:(a) genetics (b) electronics(c) hydraulics (d) pneumatics
Skylark Science 8 44 Model Papers15. The centre of the lens is called:
(a) principal focus (b) optical centre(c) centre of curvature (d) principal axis
Part -B (Open Ended Questions) Marks: 70Q.1. Fill in the blanks. (5×2)1. A lens that spreads light apart is a _______ lens.2. An electric iron uses a _______ strip to work.3. An English scientist, _______ discovered that a
magnet can produce electricity in a wire. 4. Thermal power stations burn _______ to produce
electricity.5. Scientists frequently use _______ to observe objects
in space.Q.2 Answer the following question in short. (10 × 3)1. At what temperature water has maximum volume?2. Why are expansion gaps provided in the rail tracks?3. What does the word thermometer mean?4. What are two major types of lenses?5. What is the principal axis of a lens?6. What is short-sightedness?7. Define electromagnetic induction.8. Define electronics.9. Define space technology.10. Define microgravity.Q.3. Answer the questions in detail. (any five)
(5×6)1. Describe a few uses of lenses in our everyday life.2. Write down three effects of expansions and
contraction. How are these effects overcome?3. Explain the structure and working of a generator.4. Describe the basic components of an electronic
system.
Skylark Science 8 45 Model Papers5. Write a note on spacecrafts.6. Describe some applications of thermal expansion
and contraction of solids. 7. What are the defects of vision? How can they be
corrected? Also make diagrams to support your answer.
Skylark Science 8 46 Model PapersModel Paper No-1 4th Term (Units 1 - 12)
Time Allowed: 2 Hours Total Marks: 100
Part -A (Multiple Choice Questions) Fifteen (15) Multiple Choice Questions (MCQs) are given in this part. All questions carry equal marks.(15 x 2)1. What is the term for the part of the nervous
system that includes the brain and spinal cord? (a) Central nervous system (b) Dorsal nervous system (c) peripheral nervous system (d) Lateral nervous system
2. Nerves in our hand receive the message of pain
and send it to the:(a) brain (b) spinal cord(c) medulla (d) cerebrum
front of the chemical formula is:(a) product (b) co-efficient(c) equation (d) reactant
Skylark Science 8 47 Model Papers7. Hydrochloric acid has a pH of 1. If just enough
sodium hydroxide was added to neutralise some
of the acid, the final pH would be:(a) 1 (b) 7(c) 5 (d) 9
8. In liquids, the pressure:(a) increases with depth (b) decreases with depth (c) remains same at all depths (d) sometimes increases sometimes decreases
9. A comparison of a certain quantity with astandard is called:(a) system international (b) measurement(c) description (d) evaporation
10. The unit of heat energy is:(a) Newton (b) Joule(c) Kelvin (d) Ampere
11. The focal length (f) is the distance:(a) between optical centre and principal focus (b) between principal focus and centre of curvature (c) between principal focus F and 2F (d) between optical centre and centre of curvature
12. What type of image is formed on the retina of
your eye?(a) real and inverted (b) real and erect(c) virtual and inverted (d) virtual and erect
13. What type of chemical reaction absorbs energy
and requires energy to start?(a) endothermic (b) exothermic(c) addition (d) decomposition
14. A meniscus is the curved surface of a:(a) metal (b) gas(c) solid (d) liquid
Skylark Science 8 48 Model Papers15. A device that changes the voltage of alternating
current is a:(a) transformer (b) motor(c) generator (d) galvanometer
Part -B (Open Ended Questions) Marks: 70Q.1. Fill in the blanks. (5×2)1. The largest part of our brain is _______2. Ozone protects us from _______3. Atmospheric pressure is measured by a device
called _______4. A lens that spreads light apart is a _______ lens.5. Scientists discover and explore the _______ by
means of space technology.Q.2 Answer the following question in short. (10 × 3)1. What is a neuron?2. Why are kidneys essential for our life?3. What food products are made from biotechnology?4. What are 3 Rs?5. Define neutralization.6. Why can horses not move easily in sandy soil but
camels can?7. At what temperature water has maximum volume?8. Define a lens.9. Define heat.10. Define space technology.Q.3. Answer the questions in detail. (any five)(5 × 6)1. Describe the structure and functions of human
brain.2. What is air pollution? Name of few air pollutants.
Also describe sulphur dioxide.3. Describe a few applications of hydraulics.
Skylark Science 8 49 Model Papers4. Explain the structure and working of a generator.5. Write a note on spacecrafts.6. Write properties of acids. Also write uses of some
common acid. 7. Describe some applications of thermal expansion
and contraction of solids.
Skylark Science 8 50 Model PapersModel Paper No-2 4th Term (Units 1 - 12)
Time Allowed: 2 Hours Total Marks: 100
Part -A (Multiple Choice Questions) Fifteen (15) Multiple Choice Questions (MCQs) are given in this part. All questions carry equal marks.(15 x 2)1. Which part of our excretory system work like a
Skylark Science 8 52 Model Papers15. In liquids, the pressure:
(a) increases with depth (b) decreases with depth (c) remains same at all depths (d) sometimes increases sometimes decreases
Part -B (Open Ended Questions) Marks: 70Q.1. Fill in the blanks. (5×2)1. Genes are the part of _______2. Chemical changes are usually called _______3. The SI unit of volume is _______4. An English scientist, _______ discovered that a
magnet can produce electricity in a wire.5. The largest part of our brain is _______Q.2 Answer the following question in short. (10 × 3)1. What are the daughter cells?2. What is DNA?3. Define a chemical reaction.4. What is an exothermic reaction?5. Define pneumatics.6. Name three instruments used to measure length.7. What is short-sightedness?8. Define electronics.9. What are 3 Rs?10. Why can horses not move easily in sandy soil but
camels can?Q.3. Answer the questions in detail. (any five) (5 x 6)1. Describe the basis of heredity.2. Explain the re-arrangement of atoms in chemical
reactions with examples.3. Write a note on time and its measurement.4. Describe a few uses of lenses in our everyday life.
Skylark Science 8 53 Model Papers5. Describe the structure and functions of human
brain.6. What is air pollution? Name of few air pollutants.
Also describe sulphur dioxide.7. Describe a few applications of hydraulics.
Skylark Science 8 54 Model PapersModel Paper No-3 4th Term (Units 1 - 12)
Time Allowed: 2 Hours Total Marks: 100
Part -A (Multiple Choice Questions) Fifteen (15) Multiple Choice Questions (MCQs) are given in this part. All questions carry equal marks.(15 x 2)1. Genetic engineering is:
(a) plastic surgery(b) addition or removal of genes(c) study of cells (d) study of algae
2. The basic substance of heredity is:(a) Deoxy ribonucleic acid (b) protein (c) vitamin A (d) fatty acid
3. What is the term for the part of the nervous
system that includes the brain and spinal cord? (a) Central nervous system (b) Dorsal nervous system (c) peripheral nervous system (d) Lateral nervous system
4. Neutralization can be described as:(a) an acid and alkali cancelling each other out (b) an acid becoming clearer in colour. (c) salt dissolving in water (d) bubbles of gas appearing
5. The following reaction is: 2H2O + Heat 2H2+O2
(a) an exothermic reaction(b) an endothermic reaction(c) a simple reaction (d) a complex reaction
Skylark Science 8 55 Model Papers6. A major source of carbon monoxide (CO) is:
(a) plants (b) motor vehicles(c) refrigeration (d) animals
7. When a substance is heated, its molecules absorb
energy and: (a) start vibrating slow (b) stops moving (c) start moving faster (d) jump out of the substance
8. The decrease in an object’s volume due tochange in heat:(a) Thermal expansion (b) Thermal contraction(c) condensation (d) evaporation
9. Hydrochloric acid has a pH of 1. If just enough
sodium hydroxide was added to neutralise some
of the acid, the final pH would be:(a) 1 (b) 7(c) 5 (d) 9
10. Astronauts in free fall experience:(a) gravity (b) weightlessness(c) mass loss (d) microgravity
11. Which space project is a very good example of
cooperation? (a) space shuttle project (b) The international space station (c) exploration of Mars (d) tourism in space
12. The unit of heat energy is:(a) Newton (b) Joule(c) Kelvin (d) Ampere
13. What type of image is formed on the retina of
your eye?(a) real and inverted (b) real and erect
(c) virtual and inverted (d) virtual and erect
Skylark Science 8 56 Model Papers14. A comparison of a certain quantity with a
standard is called:(a) system international (b) measurement(c) description (d) evaporation
15. In a chemical equation, the number written in
front of the chemical formula is:(a) product (b) co-efficient(c) equation (d) reactant
Part -B (Open Ended Questions) Marks: 70Q.1. Fill in the blanks. (5×2)1. Vaccines are made from _______causing2. Acids react with metals and produce _______ gas.3. When _______ is added to solids, liquids or gases
they increase in size.4. Scientists discover and explore the _______ by
means of space technology.5. A lens that spreads light apart is a _______ lens.Q.2 Answer the following question in short. (10 × 3)1. What is biotechnology?2. What is a neuron?3. What is the difference between an acid and an
alkali?4. What food products are made from biotechnology?5. Define heat.6. Define neutralization.7. Define space technology.8. At what temperature water has maximum volume?9. Why are kidneys essential for our life?10. Define a lens.
Skylark Science 8 57 Model PapersQ.3. Answer the questions in detail. (any five) (5 × 6)1. How can biotechnology help farmers to reduce the
use of insecticides and herbicides? 2. Write properties of acids. Also write uses of some
common acid. 3. Describe some applications of thermal expansion
and contraction of solids.4. Write a note on spacecrafts.5. Explain the structure and working of a generator.6. What is air pollution? Name of few air pollutants.
Also describe sulphur dioxide.7. Explain the structure and working of a generator.
Skylark Science 8 58 Model PapersModel Paper No-4 4th Term (Units 1 - 12)
Time Allowed: 2 Hours Total Marks: 100
Part -A (Multiple Choice Questions) Fifteen (15) Multiple Choice Questions (MCQs) are given in this part. All questions carry equal marks.(15 ×2)1. The passing of characteristics from one
generation to another:(a) selective breeding (b) genetic engineering(c) heredity (d) population
2. What is the term for the part of the nervous
system that includes the brain and spinal cord? (a) Central nervous system (b) Dorsal nervous system (c) peripheral nervous system (d) Lateral nervous system
3. Genetic engineering is:(a) plastic surgery(b) addition or removal of genes(c) study of cells (d) study of algae
4. What type of chemical reaction absorbs energy
and requires energy to start?(a) endothermic (b) exothermic(c) addition (d) decomposition
5. A major source of carbon monoxide (CO) is:
(a) plants (b) motor vehicles(c) refrigeration (d) animals
6. Neutralization can be described as:(a) an acid and alkali cancelling each other out (b) an acid becoming clearer in colour. (c) salt dissolving in water
(d) bubbles of gas appearing
Skylark Science 8 59 Model Papers7. A meniscus is the curved surface of a:
(a) metal (b) gas(c) solid (d) liquid
8. Hydrochloric acid has a pH of 1. If just enough
sodium hydroxide was added to neutralise some
of the acid, the final pH would be:(a) 1 (b) 7(c) 5 (d) 9
9. When a substance is heated, its molecules absorb
energy and: (a) start vibrating slow (b) stops moving (c) start moving faster (d) jump out of the substance
10. A device that changes the voltage of alternating
current is a:(a) transformer (b) motor(c) generator (d) galvanometer
11. The unit of heat energy is:(a) Newton (b) Joule(c) Kelvin (d) Ampere
12. Astronauts in free fall experience:(a) gravity (b) weightlessness(c) mass loss (d) microgravity
13. The focal length (f) is the distance:(a) between optical centre and principal focus (b) between principal focus and centre of curvature (c) between principal focus F and 2F (d) between optical centre and centre of curvature
14. In liquids, the pressure:(a) increases with depth (b) decreases with depth (c) remains same at all depths (d) sometimes increases sometimes decreases
Skylark Science 8 60 Model Papers15 Which gas can cause coughing, chest pains and
Part -B (Open Ended Questions) Marks: 70Q.1. Fill in the blanks. (5×2)1. Ozone protects us from _______2. Genes are the part of _______3. Atmospheric pressure is measured by a device
called _______4. The SI unit of volume is _______5. An English scientist, _______ discovered that a
magnet can produce electricity in a wire.Q.2 Answer the following question in short. (10 × 3)1. What is DNA?2. What are the daughter cells?3. What is biotechnology?4. What are 3 Rs?5. Define a chemical reaction.6. What is an exothermic reaction?7. Why can horses not move easily in sandy soil but
camels can?8. Define pneumatics.9. What is short-sightedness?10. Define electronics.Q.3. Answer the questions in detail. (any five)(5 × 6)1. What is air pollution? Name of few air pollutants.
Also describe sulphur dioxide.2. Describe the basis of heredity.3. Describe a few applications of hydraulics.4. Write a note on time and its measurement.
Skylark Science 8 61 Model Papers5. Describe a few uses of lenses in our everyday life.6. Describe the structure and functions of human
brain. 7. Explain the re-arrangement of atoms in chemical
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