Recent Climate Change - MRS. BELLAN

[Pages:4]Name

Date

Class

Lesson Outline

LESSON 3

Recent Climate Change

A. Regional and Global Climate Change

1. Earth's average temperatures have been 100 years.

for the last

2. The latest warming trend has been greatest in the hemisphere.

B. Human Impact on Climate Change

1. The rise in Earth's average surface temperature during the past 100 years is

called

.

a. Some scientists think that most of this temperature change is the result of

activity.

b. Some scientists think that global warming is the result of natural

cycles.

2.

are gases in the atmosphere that absorb Earth's

outgoing infrared radiation.

a. Greenhouse gases include

, water vapor, and methane.

b. The greenhouse effect has been increasing because of increasing levels of

in the atmosphere.

c.

sources of carbon dioxide include volcanic eruptions,

forest fires, and cellular respiration.

d. fuels.

sources of carbon dioxide include burning fossil

3.

is the large-scale cutting or burning of forests.

4. Deforestation increases fewer trees to use the gas.

in the air because there are

5. Tiny liquid or solid particles called atmosphere when fossil fuels burn.

are released into the

6. Most aerosols

sunlight into space and form small-

droplet clouds that cool the atmosphere.

C. Climate and Society

1. Warmer temperatures cause more change rain patterns worldwide.

from the oceans and

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46

Climate

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Lesson Outline continued

2. Melting glaciers and ice sheets cause sea level to

.

3. Warmer temperatures melt frozen soil in the

.

D. Predicting Climate Change

1. A(n) predict future climates.

is a set of complex equations that are used to

a. Powerful

are used to solve the equations.

b. The results of the solutions are shown as a(n)

.

2. One disadvantage of GCM is that immediately to real climate data.

cannot be compared

3. Most GCMs predict further gas emissions.

as a result of greenhouse

4. It is predicted that Earth's population will increase by percent by 2050 and will continue to produce significant amounts of greenhouse gases.

5. One way to reduce rising levels of pollution and greenhouse gases in the

atmosphere is to develop

fuels.

a. Alternative fuels do not release

into the atmosphere.

b. Examples of alternative fuels include wind energy.

energy and

6.

can be reduced by green building, planting trees,

conserving fuel, and recycling.

Copyright ? Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.

Climate

47

Lesson Outline for Teaching

Lesson 3: Recent Climate Change

A. Regional and Global Climate Change 1. Earth's surface air temperatures have been increasing for the last 100 years. 2. The latest warming trend has been greatest in the northern hemisphere.

B. Human Impact on Climate Change 1. The rise in Earth's average surface temperature during the past 100 years is called global warming. a. Most scientists agree that most of this temperature change is the result of human activity. b. Some scientists think that global warming is the result of natural climate cycles. 2. Greenhouse gases are gases in the atmosphere that absorb Earth's outgoing infrared radiation. a. Greenhouse gases include carbon dioxide, water vapor, and methane. b. The greenhouse effect has been increasing because of increasing levels of carbon dioxide in the atmosphere. c. Natural sources of carbon dioxide include volcanic eruptions, forest fires, and cellular respiration. d. Human-caused sources of carbon dioxide include burning fossil fuels. 3. Deforestation is the large-scale cutting or burning of forests. 4. Deforestation increases carbon dioxide in the air because there are fewer trees to use the gas. 5. Tiny liquid or solid particles called aerosols are released into the atmosphere when fossil fuels burn. 6. Most aerosols reflect sunlight into space and form small-droplet clouds, cooling the atmosphere.

C. Climate and Society 1. Warmer temperatures cause more evaporation from the oceans and change rain patterns worldwide. 2. Melting glaciers and ice sheets cause sea level to rise. 3. Warmer temperatures melt frozen soil in the Arctic.

Copyright ? Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.

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Climate

Lesson Outline continued

D. Predicting Climate Change 1. A(n) global climate model is a set of complex equations used to predict future climates. a. Powerful supercomputers are used to solve the equations. b. The results of the solutions are shown as a(n) map. 2. One disadvantage of GCM is that predictions cannot be compared immediately to real climate data. 3. Most GCMs predict further global warming as a result of greenhouse gas emissions. 4. It is predicted that Earth's population will increase by 50 percent by 2050 and will continue to produce significant amounts of greenhouse gases. 5. One way to reduce rising levels of pollution and greenhouse gases in the atmosphere is to develop alternative fuels. a. Alternative fuels do not release carbon dioxide into the atmosphere. b. Examples of alternative fuels include solar energy and wind energy. 6. Greenhouse gases can be reduced by green building, planting trees, conserving fuel, and recycling.

Discussion Question

What could you do in your daily life to reduce the amount of greenhouse gases in the atmosphere? Possible answer: Walk or ride a bike instead of traveling by a motorized vehicle, turn off lights, and plant trees.

Copyright ? Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.

Climate

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