GLY 1001 Chapter 17 Name:___________

Part K: Key Terms Chapter 17

Fill-in-the-blank with the word(s) that best fit the definition:

1.____________________ - A form of condensation best described as a dense concentration of suspended water droplets or tiny ice crystals.

2. ____________________- One of three basic cloud forms: also one of the three high cloud types. They are thin, delicate ice-crystal clouds often appearing as veil-like patches or thin, wispy fibers.

3. ____________________- One of three basic cloud forms; also the name given one of the clouds of vertical development. Cumulus are billowy individual cloud masses that often have flat bases.

4. ____________________- One of the three basic cloud forms; also, the name given one of the flow clouds. They are sheets or layers that cover much or all of the sky.

5. ____________________- Cooling or warming of air caused when air is allowed to expand or is compressed, not because heat is added or subtracted.

6. ____________________- The rate of adiabatic temperature change in saturated air. The rate of temperature change is variable, but it is always less than the dry adiabatic rate.

7____________________- The rate of adiabatic cooling or warming in unsaturated air. The rate of temperature change is 1^o C per 100 meters.

8. ____________________- The change of state from a gas to a liquid.

9. ____________________- The process of converting a liquid to a gas.

10. ____________________- The temperature to which air has to be cooled in order to reach saturation

11. ____________________- A cloud with its base at or very near the Earth's surface.

12. ____________________- Nearly spherical ice pellets having concentric layers and formed by the successive freezing of layers of water

13. ____________________ - Frozen or semifrozen rain formed when raindrops freeze as they pass through a layer of cold air.

14. ____________________- A solid form of precipitation produced by sublimination of water vapor.

15. ____________________- The ratio of the air's water-vapor content to its water-vapor capacity

16. ____________________ - A general term referring to water vapor in the air but not to liquid droplets of fog, cloud or rain.

17. ____________________- An instrument designed to measure relative humidity.

18. ____________________- A device consisting of two thermometers (wet bulb and dry bulb) that is rapidly whirled and, with the use of tables, yields the relative humidity and dew point.

19. ____________________- A thin coating ice on objects produced when supercooled fog droplets freeze on contact.

20. ____________________ - The maximum quantity of water vapor that the air can hold at any given temperature and pressure.

21. ____________________- The condition of water droplets that remain in the liquid state at temperatures well below 0^o C.

22. ____________________- The condition of being more highly concentrated than is normally possible under given temperature and pressure conditions. When describing humidity, it refers to a relative humidity that is greater than 100 per cent.

23. ____________________- That part of the total atmospheric pressure attributable to water-vapor content.

24. ____________________- Mountains acting as barriers to the flow of air, forcing the air to ascend. The air cools adiabatically and clouds and precipitation may result.

25____________________- The energy absorbed or released during a change in state.

26. ____________________- A cloud that forms below a height of 2000 meters.

27. ____________________- A cloud occupying the height range from 2000 to 6000 meters.

28. ____________________- A cloud that normally has it base above 6000 meters; the base may be lower in winter and at high latitude locations.

29. ____________________- Fog formed when rain evaporates as it falls through a layer of cool air.

30. ____________________- The conversion of a solid directly to a gas without passing through the liquid state.

31. ____________________- The process by which water vapor is changed directly to a solid without passing through the liquid state.

32. ____________________- The amount of heat required to raise the temperature of one gram of water 1^o C

33. ____________________- A coating of ice on objects formed when supercooled rain freezes on contact