1. WEATHER AND CLIMATE Chapter 1 THE ATMOSPHERE

2. Section 1 Characteristics of the Atmosphere

3. a mixture of gases that surrounds the Earth atmosphere

4. the most abundant gas in Earth’s atmosphere nitrogen

5. the second most abundant gas in Earth’s atmosphere, produced mainly by plants oxygen

6. the measure of force with which air molecules push on a surface air pressure

7. The earth’s atmosphere is held around the Earth by ________. gravity

8. the height of an object above the Earth’s surface altitude

9. As altitude increases, air pressure _________. decreases

10. As altitude decreases, air pressure __________. increases

11. Marnie and Deanna are collecting air pressure readings for a class project. Marnie is recording her data near sea level. Deanna chose to hike to the top of a nearby mountain. The picture helps us see how much more air is in the column above Marnie than above Deanna. The air pressure at sea level is greater than at Deanna's elevation.

12. lowest and densest layer of the atmosphere troposphere

13. the atmospheric layer above the troposphere; air is thin and contains little moisture stratosphere

14. a gas molecule made of 3 oxygen atoms; absorbs ultraviolet radiation from the sun that can cause skin cancer ozone Click on the picture to see “The Ozone Story.”

15. the coldest layer of the atmosphere mesosphere

16. the uppermost layer of the atmosphere thermosphere

17. the atmospheric layer that is an extension of the thermosphere exosphere

18. a mnemonic device to remember the layers of the atmosphere from lowest to highest Every time! Thermometers Mess up Storms Tropical EXOSPHERE

19. Fun and Games Bill Nye the Science Guy: The Atmosphere Bill Nye the Science Guy: The Fantastic 5 Bill Nye the Science Guy: Running the TroposphereBill Nye the Science Guy: Running the Troposphere Geography for Kids Layers of Earth’s Atmosphere Animation Vocabulary Games