Earth’s Changing Atmosphere Earth’s atmosphere is a blanket of gases that supports and protects life. Key Concepts Earth’s atmosphere supports life. Learn about the materials that make up the atmosphere. The Sun supplies the atmosphere’s energy. Learn how energy from the Sun affects the atmosphere. Gases in the atmosphere absorb radiation. Learn about the ozone layer and the greenhouse effect. Human activities affect the atmosphere. Learn about pollution, global warming, and changes in the ozone layer. 4 SECTION 3 SECTION 2 SECTION 1 SECTION 608 Unit 5: Earth’s Atmosphere What will make this kite soar? Prepare and practice for the FCAT • Section Reviews, pp. 616, 623, 627, 635 • Chapter Review, pp. 638–640 • FCAT Practice, p. 641 CLASSZONE.COM • Florida Review: Content Review and FCAT Practice
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Earth’s ChangingAtmosphere
Earth’s atmosphere is a blanket of gasesthat supports and protects life.
Key Concepts
Earth’s atmospheresupports life.Learn about the materials thatmake up the atmosphere.
The Sun supplies theatmosphere’s energy.Learn how energy from theSun affects the atmosphere.
Gases in the atmosphereabsorb radiation.Learn about the ozone layerand the greenhouse effect.
Human activities affectthe atmosphere.Learn about pollution, globalwarming, and changes in theozone layer.
4SECTION
3SECTION
2SECTION
1SECTION
608 Unit 5: Earth’s Atmosphere
What will makethis kite soar?
Prepare and practice for the FCAT
• Section Reviews, pp. 616, 623, 627, 635
• Chapter Review, pp. 638–640 • FCAT Practice, p. 641
CLASSZONE.COM• Florida Review: Content
Review and FCAT Practice
How Heavy Is Paper?Put a ruler on a table with one end off theedge. Tap on the ruler lightly and observe whathappens. Then cover the ruler with a sheet ofpaper as shown. Tap again on the rulerand observe what happens.
Observe and ThinkWhat happened to the rulerwhen you tapped lightly on it with and without the sheet of paper? Was the paper heavy enough by itself to holdthe ruler down?
How Does Heating Affect Air?Stretch the lip of a balloon over the neck of a small bottle. Next, fill a bowl with ice water and a secondbowl with hot tap water. Place thebottle upright in the hot water.After 5 minutes, move the bottle to the cold water.
Observe and Think Whatchanges did you observe inthe balloon? What might have caused these changes?
Internet Activity:AtmosphereGo to ClassZone.com to learn about Earth’satmosphere.
Observe and Think Howdoes the thickness of theatmosphere compare withthe height of a mountainor the altitude of thespace shuttle in orbit?
Chapter 17: Earth’s Changing Atmosphere 609
NSTA scilinks.org
Composition of the Atmosphere Code: MDL009
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610 Unit 5: Earth’s Atmosphere
TAKING NOTES
SUPPORTING MAIN IDEAS
Make a chart to showmain ideas and theinformation that supportsthem. Write each blueheading from the chapterin a separate box. In boxesbelow it, add supportinginformation, such asreasons, explanations, and examples.
VOCABULARY STRATEGY
Write each new vocabularyterm in the center of aframe game diagram.Decide what informationto frame the term with.Use examples, descriptions,pictures, or sentences inwhich the term is used incontext. You can changethe frame to fit each term.
CHAPTER 17
amount of mass
in a given volume
same space but
more mass = denser
air h
igher u
p is
less d
ense
gas
has
mass
DENSITY
CONCEPT REVIEW
• Matter is made up of atoms.
• All things on or near Earth are pulled toward Earth by its gravity.
• Heating or cooling any materialchanges some of its properties.
VOCABULARY REVIEW
mass p. 50
atom p. 56
molecule p. 58
gas p. 68
gravity See Glossary.
Living things use gases in the air.
The atmosphere keeps Earth warm.
The atmosphere protects life.
The atmosphere makeslife on Earth possible.
FLORIDA REVIEWCLASSZONE.COM
Content Review and FCAT Practice
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