San Francisco CollegesBrgy. 3, San Francisco, Agusan del Sur
S.Y. 2014 - 2015
Detailed Lesson Plan in Science VII
Grand Demonstration TeachingDate: February 18, 2015
Subject MatterEarth’s Atmosphere
Mrs. Nida P. OsanoCritique Teacher
Prepared byKatrina Isabelle V. Gallebo, RN
Student Teacher
At the end of the lesson, the students are expected to:1. Identify and describe the features of the 5 layers of the atmosphere.2. Explain the basis for the division of the layers of atmosphere.3. Discuss the composition of atmosphere. 4. Relate the importance of atmosphere to human kind.
Earth’s Atmosphere’s Activity Student’s Activity
With the same group, you will be given an activity. Each group will do different task:
Sun – JingleSatellite – Game ShowEarth – News Reporting/News castingMeteor – Talk showRain – Role playing
You will be given 5-7 minutes and 3-5 minutes for your presentation, after which, you will present the group’s output. Here’s the rubric on how I am going to grade your presentation (please refer to appendix A for the rubric)
(The teacher facilitates the group activity.)
Name at least 3 mineral deposits found in our country.
Mushroom: Give at least 2 mining corporations here in Caraga region.
Rose: Identify the following as renewable or non-renewable.
Yes ma’am.
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I. OBJECTIVES
Yes ma’am!
No ma’am.The skin protects our internal organs.
No one will survive because of intense heat.
Yes ma’am.
A good student listens, takes note, participates and behave well in the class ma’am.
Yes ma’am.
Group 1 – SUN GROUP.
Instruction: By using the pie graph, answer the guide questions by creating a lively jingle. Discuss the gas composition of the earth’s atmosphere by creating a lively JINGLE.
Guide Questions:
1. How much of the gases are present in our atmosphere? 2. Why do you think these gases are important to us? 3. What are the 2 most abundant gases in the atmosphere?
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Gas Composition of the Atmosphere Gases Amount (%)
Nitrogen 78Oxygen 21
Water Vapor 4Argon 0.9
Trace Gases 0.3Carbon Dioxide 0.03
Read the Selection
Gas Composition of the Atmosphere
A. Nitrogen - 78% - Dilutes oxygen and prevents rapid burning at the earth's surface. Living things need it to make proteins. Nitrogen cannot be used directly from the air. The Nitrogen Cycle is nature's way of supplying the needed nitrogen for living things.
B. Oxygen - 21% - Used by all living things. Essential for respiration. It is necessary for combustion or burning.
C. Argon - 0.9% - Used in light bulbs. D. Carbon Dioxide - 0.03% - Plants use it to make oxygen. Acts as a blanket and prevents
the escape of heat into outer space. Scientists are afraid that the burning of fossil fuels such as coal and oil are adding more carbon dioxide to the atmosphere.
E. Water Vapor - 0.0 to 4.0% - Essential for life processes. Also prevents heat loss from the earth.
F. Trace gases - gases found only in very small amounts. They include neon, helium, krypton, and xenon.
Group 2 – SATELLITE GROUP.
Instruction: Label the 5 layers of the atmosphere and identify the things commonly found in each layer. Distinguish its distance (km) from the earth’s surface. Present it to the class through a GAME SHOW.
Guide Questions:
1. What are the 5 layers of the atmosphere and how do they differ from each other? 2. How far are the layers of the layers of the atmosphere from the surface?
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640 KM
80 KM
50 KM
16 KM
OZONE LAYER
LAYER PICTU
Read the selection.
ATMOSPHERIC LAYERS
1. The troposphere (0-16 km) is the first layer above the surface and contains half of the Earth's atmosphere. Weather occurs in this layer. Air in the troposphere is constantly moving as a result aircrafts flying may have a bumpy ride (turbulence). Lowest in the north and south poles at 5 km and highest near the equator at 16 km above the earth’s surface.
2. Many jet aircrafts fly in the stratosphere because it is very stable. Also, the ozone layer absorbs harmful rays from the Sun. 16 to 50 kilometers above the earth's surface.
3. Meteors or rock fragments burn up in the mesosphere. Extends 50 to 80 kilometers above the earth's surface.
4. The thermosphere is a layer with auroras. It is also where the space shuttle orbits. Different regions of the ionosphere (extension of thermosphere) make long distance radio communication possible by reflecting the radio waves back to Earth. Starts at about 80 km high and continues to 640 km.
5. The exosphere is the outermost layer of the Earth's atmosphere. The exosphere goes from about 640 km high to about 1,280 km. Satellites are stationed here.
Group 3 – EARTH GROUP.
Instruction: Graph the estimated temperatures of each layers of the atmosphere and discuss the temperature variations.
Guide Questions:
1. What are the estimated temperatures of each layer? 2. What is the relationship between altitude and temperature in each layers?3. On what layers of the atmosphere shows that the temperature increases as the altitude
increase?
Layers of the Atmosphere
Estimated Altitude (Km) Estimated Temperature (0C) Relationship between Altitude and Temperature
Surface 0 30
Troposphere 16 -40
Stratosphere 50 0
Mesosphere 80 -100
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-100 -80 -60 -40 -20 0 20 40 60 80 Temperature (0C)
Altitude (km)
90
80
70
60
50
40
30
20
10
0
Ionosphere
Thermosphere 100 0
Exosphere 640 40
Read the selection.
Temperature and the Atmospheric Layers
The temperature of the Earth’s atmosphere varies with altitude; the relationship between temperature and altitude varies between the different atmospheric layers:
Troposphere – 0 to 16 km, temperature decreasing with height. Stratosphere – 16 to 50 km, temperature increasing with height. Mesosphere – 50 to 80 km, temperature decreasing with height. Thermosphere – 80 to 640 km, temperature increasing with height. Exosphere – 640 +, temperature is increasing with height.
The air at the surface up to around 16 kilometers is called the troposphere. The reason it is warmer at the surface is simple. The air is warmed by heat given off by the Earth! The farther away from the surface the air moves, the less heat there is to absorb.
From 16 to 20 kilometers the atmosphere is stable. From 20 to about 50 kilometers in this region the air actually warms with height! Ozone is concentrated in this part of the atmosphere and it absorbs ultraviolet light from the Sun. More light is absorbed at higher altitudes compared to the lower stratosphere, so the temperature increases.
At about 50 km, the mesosphere begins. In the mesosphere, the temperature decreases with height again, because there is very little ozone to warm up the air.
Thermosphere which is the section of the atmosphere higher than 80 km. In this region, the temperature increases again! This time, it is molecular oxygen (O2) that causes the temperature increase. The oxygen absorbs light from the Sun, and since there is very little air in the thermosphere, just a little absorption can go a long way!
The exosphere is almost a vacuum. The "air" is very, very thin there. When air is thin, it doesn't transfer much heat to objects in the air, even if the air is very, very hot.
Group 4 – METEOR GROUP.
Instruction: Enumerate and discuss the negative effects of human activities on our atmosphere. Present it to the class through a TALK SHOW.
Guide Questions:
1. Why do you think atmosphere is important? 2. What are the ill effects of human activities on our atmosphere?
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Group 5 – RAIN GROUP.
Instruction: Make a short skit about Global Warming or Climate Change. Present it to the class in a ROLE PLAY manner.
Guide Questions:
1. What are the effects of too much heat on us and on our planet?2. What can we do to prevent the rapid change in climate?
Teacher’s Activity Student’s Activityb. Discussion
Time’s up! Please tuck your works on the board. Now let us see your present
The atmosphere is an important part of what makes Earth liveable. It contains gases that are essential to life.
What are the main components of our atmosphere?
What is the importance of nitrogen?
Our atmosphere is divided into how many layers? And what are these layers?
(Students tuck their works)
Nitrogen and oxygen are the main components of our atmosphere. Together they comprise 99% of our atmosphere. Nitrogen is used for bulbs, explosives, tyres, helps in processing fertilizers, acts as neutralizer, and helps in body buildings proteins.We have 5 main layers namely from top to bottom: Exosphere, Thermosphere, Mesosphere, Stratosphere and Troposphere.
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Human Activities Negative Effects
People cut too many trees for lumber to make papers and build houses
Refrigeration agents and other industrial processes emits
Halocarbons (CFC)
Too much use of fertilizers which contains nitrous oxide.
When humans burn coal, oil and gas (fossil fuels) to generate electricity or
drive our cars
I’ll give you mnemonics about the layers of the atmosphere to better remember it. Troubled = Troposphere Super = Stratosphere Man = Mesosphere Tricked = Thermosphere Ellen = Exosphere
What are the common scenes we usually observed on each layers?
What do you think is the basis for the division of our atmosphere?
In what layers of the atmosphere does the temperature increase with height?
In the troposphere, why do you think temperature decrease as altitude increases?
Why do you think the temperature in the stratosphere increases with height?
In the mesosphere, temperature decreases as height increases, what do you think causes this temperature variation?
Temperature increases with altitude in the thermosphere. Give a possible explanation.
What are the relationship of altitude and temperature between each layer?
Troposphere is where the weather forms; commercial airplanes also fly on this layer. The air is very unstable on this layer that’s why we sometimes experience a bumpy ride which we call turbulence. The highest peak in the world which is the Mt. Everest also seats in this layer.Stratosphere is where a spy jet flies because the air is very stable. Ozone layer is also found here. Mesosphere is where meteors and other rock fragments burn up. Thermosphere is where auroras are found. Sun's energy is so strong at this level, that it breaks apart molecules. So there ends up being electrons floating around and molecules which have lost or gained electrons that is why we have radio signals because of this layer.Exosphere, the outermost layer and extends through space. It is where the satellites are stationed.
Due to temperature variations ma’am!
In the Stratosphere, Thermosphere and Exosphere.
The air is warmed by heat given off by the Earth! The farther away from the surface the air moves, the less heat there is to absorb.
Because of increasing amounts of ozone which absorbs harmful UV lights.
There is very little ozone to warm up the air.
The few molecules that are present in the thermosphere receive extraordinary amounts of energy from the Sun, causing the layer to warm to such high temperatures
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How does our atmosphere help and protect us?
Valuing
Now, imagine our planet without the atmosphere, what do you think will happen?How can we be able to survive?
Now that we’ve learn the importance of our atmosphere as students, how can you help protect our atmosphere? Well said. (Video clip on global warming)
Generalization
It is cooler in Baguio that in Manila. Baguio is at a higher altitude than Manila. Shouldn’t it be warmer in Baguio since it is a lot closer to the sun?
Layers of the Atmosphere
Relationship between Altitude and Temperature
Troposphere Inversely proportionalStratosphere Directly proportionalMesosphere Inversely proportional
Thermosphere Directly proportional
Exosphere Directly proportional
Atmosphere helps us in many ways:
1. Breathing comes naturally. We need oxygen to keep our bodies working.
2. A radiation shield. 3.4. Security Blanket. The atmosphere also keeps
us warm. 5.6. Weathering the storm. Closely related to
temperature regulation, the atmosphere also gives us weather.
7.8. Look out below! Another really important thing
that the atmosphere does is to protect us from objects coming toward the earth from outer space.
9.Plant life. The atmosphere is also very important for plants because it contains a small amount of carbon dioxide. Plants use the carbon dioxide (CO2) along with sunshine to carry out a process called photosynthesis.
Let’s Talk. One more thing the atmosphere does is it allows us to talk to each other. If you were talking to your friend and there were no air between the two of you, your friend would not be able to hear a thing you said.
Life might not be possible on earth because temperature will not be regulated.
We must conserve energy and lessen the use of harmful chemicals. We must plant more trees and be a good shepherd to our natural resources.
The troposphere is warmed primarily by infrared radiation emitted by Earth’s surface. Increasing altitude also increases the distance from the heat source leading to a decrease in temperature.
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Quiz Bowl - Directions: Multiple choice. Before a question is read, each group must raise the chalk. I will say “GO” and only then the team be allowed to write the answer. When you hear the word “STOP” the team should STOP writing and raise their answer pad.
1. What layer of the atmosphere where humans live and weather activity also occurs in this layer? – 3 pts.a. Stratosphere b. Thermosphere c. Troposphere
2. The layer of the atmosphere where meteors and rock fragments melt? – 3 pts.a. Mesosphere b. Thermosphere c. Exosphere
3. What layer of the atmosphere where temperature is increasing with height? – 3 pts.a. Troposphere & Mesosphere b. Thermosphere & Stratosphere c. Mesosphere & Exosphere
3. Which of the following is seen in the Thermosphere? – 3 pts.a. Airplane b. Aurora c. Ozone Layer
5. Is the term used to describe a gradual increase in the average temperature of the Earth's atmosphere and its oceans, a change that is believed to be permanently changing the Earth’s climate? – 5 pts.
Global Warming
Please take note of your assignment. Write a letter to your 20 year old self. Describe our planet today and the effects of global
warming in your daily life. Write your desire to make a difference. Seal your letters in a short envelope.
APPENDIX A: Presentation Learning Activity Rubric
Content- offers current information on the topic chosen thoroughly covers each aspect of the question.
40 %
Presentation – The student makes a genuine effort to present, not just read the material.
35 %
Teamwork – Each member of the group is actively and effectively participating towards a specific goal.
25 pts.
TOTAL 100%
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IV. EVALUATION
V. ASSIGNMENT
