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MatterScience – Grade 8
Physical Science
Facts About Matter?All matter is made up of atoms
Matter is found all over the universe
Matter can be grouped into three states (forms):
1) solid (like a pencil) 2) liquid (like water) 3) gas (like the helium used to fill balloons)
Facts About Matter? Matter has three properties:
1) shape: the form it takes 2) mass: the amount of matter in an object (measured in grams) 3) volume: the space it takes
Word StudyThe word volume has different meanings.
It can mean “loudness.”Example: I can’t hear the radio. Please turn up the volume.
It also means “the amount of space something occupies (takes).”Example: The volume of lemonade in the pitcher is 2 liters.
Word StudyThe word property also has different meanings.
Property can mean an objet own by someone. If you own a bicycle, it is your property.
Property can also mean “a characteristic or trait.” One property of this apple is that it is red.
Keep in Mind
We measure th
e mass
of an object with
a
balance.
Matter has boiling
points, melting points
and freezing points.
We measure this with
a thermometer.
We measure the
volume of a liquid or
a solid with a
graduated cylinder.
SolidEasy to recognizeHave shape, mass and volume
Shape does NOT change
Made up of atoms packed closely together
Examples: TVs, beds, chairs, food you eat
LiquidShape can changeHave definite mass and volume
Different from solids because atoms can move around
Take the shape of their containers
Examples: water, milk, juice, sodas
GasDo NOT have definite shape or volume
Shape and volume can change
Take the shape of their containers
Atoms are spacedYou cannot see themExamples: air you breathe, air in the tires, the sun!
Changes of StateThink of it this way:
An ice cube is a solid. If you heat an ice cube, it melts and changes to water. Water is a liquid. The melting point of ice is 0°C. If you heat the water, it boils and becomes steam. Steam is a gas. The boiling point of water is 100°C.
Three states of water
Solid: ice cubes
3
States
Liquid: Water
Solid: ice cubesof
Water
Gas: Steam
Matter: Changes
Physical Changes: When matter changes shape and state. During this change the identity of the substance does
NOT change. For example when ice melts it is a physical change. When glass breaks, it is a physical change.
:
Matter: ChangesChemical Changes: During a chemical
change NEW substances form. These new substances can elements or compounds. They have DIFFERENT properties from the
original substance. For example, when wood burns, it produces ashes and gases. They
have different properties from wood.
:
Practice: States of Matter
NeoK12 Practice
Follow the link to practice:
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Click on activities and quizzes for matter