1. Vocabulary Review Weather

2. Air pollution formed by the reaction of water in the air with chemicals, particularly sulfur dioxide, given off as waster, mostly by factories and automobiles. Acid Rain

3. A body of air hundreds or thousands of miles across with the same temperature and moisture. Air Mass

4. An instrument for measuring wind speed. Anemometer

5. The air surrounding the Earth. Atmosphere

6. The relationship between the direction of the wind and the location of high and low pressure areas making it. Ballot’s Law

7. An instrument for measuring air pressure. Barometer

8. A measure of wind strength. Beaufort Scale

9. A change of a substance from a gas to a liquid. Condensation

10. The apparent force that as a result of the Earth’s rotation deflects air currents to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. Coriolis Effect

11. The temperature at which air is saturated with water and water vapor condenses. Dew Point

12. The range of wavelengths of radiation from the Sun, extending from gamma rays to radio waves Electromagnetic Spectrum

13. Area of relative calm at the center of a hurricane. Eye of a hurricane

14. Boundary between cold and warm air masses, usually represented on weather map with an “L”, because if forms a low pressure center. Front

15. The warming of the lower layers of the atmosphere caused by heat being trapped by increased carbon dioxide in the air. Greenhouse Effect

16. Higher than normal air pressure, such as the surface pressure at the center of an air mass. Represented on a weather map with an “H” High

17. A cyclonic storm, usually tropical in orgin. Called cyclone in the Indian Ocean, typhoon in the Pacific and willy-willy in Australia. Hurricane

18. An instrument for measuring moisture in the air. Hygrometer

19. High speed winds above the stratosphere usually blowing in a westerly direction. Jet Stream

20. Lower than normal air pressure, such as the boundary between air masses. Represented by “L”, it usually means bad weather. Low

21. A scientist who studies weather and climate. Meteorologist

22. Definition TERM

23. A unit of atmospheric pressure used by meteorologists (1 inch = 33.87 millibars) Millibar

24. A special form of oxygen that forms naturally in the upper air and filters out the Sun’s harmful u-v rays. Smog

25. Water that falls from the clouds to earth as rain, snow, sleet, or hail. Precipitation

26. Winds that usually blow from the same direction. Prevailing Winds

27. The amount of moisture in the air compared to the moisture that the air can hold at that particular temperature. Relative Humidity

28. A weather report using picture symbols to indicate various weather factors. Station model

29. The lower part of the atmosphere in which most weather takes place. Troposphere

30. A chart that measures the discomfort we feel based on a combination of temperature and moisture in the air. Temperature- humidity index

31. A violent, whirling wind along with a funnel-shaped cloud. “Twister” Tornado

32. A column of air moving rapidly upward inside a storm Updraft

33. The process by which oceans and smaller bodies of water evaporate into the air and then condense and return in the form of rain or snow. Water Cycle

34. A measure of the discomfort we feel based on a combination of temperature and wind speed. Wind Chill Factor