Section Assessment

Section Summary

I At the same pressure, warmer air is less dense than cooler air.

I Air moves from regions of high pressure to regions of low pressure.

I The dew point of air depends on the amount of water vapor the air contains.

I Latent heat is released when water vapor condenses and when water freezes.

Understand Main Ideas

1. iman4TTHB Identify three properties of the atmosphere and describe how they vary with height in the atmosphere.

2. Explain what occurs during a temperature inversion.

3. Describe how the motion of particles in a material changes when the temperature of the material increases.

Think Critically

4. Predict how the relative humidity and dew point change in a rising mass of air.

5. Design an experiment that shows how average wind speeds change over different types of surfaces.

■Miiiinr^ Earth Science

6. If the average thickness of the troposphere is 11 km, what would be the temperature difference between the top and bottom of the troposphere if the temperature decrease is the same as the dry adiabatic lapse rate?

296 Chapter 11 • Atmosphere

Self-Check Quiz

296 Chapter 11 • Atmosphere

Self-Check Quiz

Section 11.3


I Explain the difference between stable and unstable air. I Compare and contrast low, middle, high, and vertical develop ment clouds. I Explain how precipitation forms.

Review Vocabulary condensation: process in which water vapor changes to a liquid

New Vocabulary condensation nucleus orographic lifting cumulus stratus cirrus precipitation coalescence

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Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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