1. Chapter 23 Study Notes Water in the Atmosphere

2. 1  An instrument that measures relative humidity with two identical thermometers is a ________. psychrometer. psychrometer.

3. 2  Most _________ comes from _____ oceans. evaporation evaporation equatorial equatorial

4. 3  The ______ point is the temperature at which the rate of _______ equals the rate of evaporation. dew dew condensation condensation

5. 4  If the temperature stays the same and the air becomes _____ moist, the relative humidity will ________. more more increase increase

6. 5  ________ ______ must be present in order for clouds to form. Condensation Condensation nuclei nuclei

7. 6  The _____ of the clouds marks the ________ _______. base base condensation level condensation level

8. 7  Precipitation in the form of ____ of ice is ____. lumps lumps hail hail

9. 8  Cloud _______ sometimes ________ and sometimes _______ precipitation. seeding seeding increases increases decreases decreases

10. 9  The most ______ form of solid precipitation is ____. common common snow snow

11. 10  If enough energy is ______ by liquid water the water will change to a ____. absorbed absorbed gas gas

12. 11  An instrument that measures precipitation by bouncing radio waves off rain or snow is ____________ ________. Doppler radar Doppler radar

13. 12  A cloud whose name has the prefix ____- or the suffix –nimbus is ___________. nimbo nimbo rain-producing rain-producing

14. 13  In cloud seeding, _______ crystals are used as freezing nuclei. silver-iodide silver-iodide

15. 14  When the air ________ decreases, the rate of ______ decreases. temperature temperature evaporation evaporation

16. 15  Clouds that often bring _______ are_____________. thunderstorms thunderstorms cumulonimbus cumulonimbus

17. 16  Precipitation that occurs when rain falls through a layer of freezing air close to the ground is known as ____. sleet sleet

18. 17  Condensation _____ are ____ and ____ particles. nuclei nuclei ice ice dust dust

19. 18  Technology that can save lives by ______ people of an approaching storm is Doppler ______. warning warning radar radar

20. 19  The most _______ in the atmosphere is found over air near places like Hawaii that are ____ the equator. moisture moisture near near

21. 20  The process that causes _____ formation when a moving mass of air meets a mountain range is called _____. cloud cloud lifting lifting

22. 21  The clouds with the _____ altitude of any clouds in the sky are _____ clouds. highest highest cirrus cirrus

23. 22  The process of ____ formation that occurs when one body of moist air combines with another body of moist air with a different temperature is called ______. cloud cloud mixing mixing

24. 23  Clouds that begin to form at very _____ altitudes, covering large areas of sky and often blocking out the sun, are ____ clouds. low low stratus stratus

25. 24  _____ is the process by which fast-moving molecules escape from a ______ to form water vapor. Evaporation Evaporation liquid liquid

26. 25  __________ _______ is the heat energy absorbed or released by a substance during a _________ change. Latent heat Latent heat phase phase

27. 26  ______ is the process in which water _____ changes into a liquid. Condensation Condensation vapor vapor

28. 27  The condensation that occurs when air comes into contact with _______ and cools is called _____. grass grass dew dew

29. 28  _________ is the process by which a ____ changes directly into a ___. Sublimation Sublimation solid solid gas gas

30. Now STUDY for the TEST!!!