Chapter 18: Earth's Atmosphere

4. A layer of concentrated ozone in the stratosphere that shields the earth from harmful ultraviolet light (2 words, no space)
6. A temperature layer in the atmosphere above the troposphere and below the mesosphere
7. A temperature layer of the atmosphere above the mesosphere which contains the highest temperatures of all the layers.
11. The coldest layer of the atmosphere located between the stratosphere and thermosphere
14. The layer of the atmosphere above the thermosphere where it begins to thin into interplanetary space
15. A region of variable height in the atmosphere where solar radiation breaks down gas molecules into ions

1. The flow rate of radiant energy from sun through space to reach Earth (2 words, no spaces)
2. The geomagnetic field that surrounds the earth from the interior outward that protects living organisms from solar radiation
3. The steady drop of temperature with altitude in the troposphere (2 words, no space)
5. A process by which a planet’s atmosphere keeps energy from being lost to space (2 words, no space)
8. A layer of the earth’s atmosphere in which there is a uniform mixture of gases
9. A region of the earth’s atmosphere in which there are distinct layers of different gases
10. The envelope of gases that surrounds the earth held in place by gravity
12. The lowest temperature layer of the earth’s atmosphere extending from ground level to about 11 km
13. A belt of high-speed winds in the stratosphere that flow across the upper and middle latitudes (2 words, no space)