3. Lines on a weather map that connect points of equal air pressure are A. isotherms B. isobars C. cold fronts D. warm fronts

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1 1. The chart shows the relationship between altitude and air pressure. What is the approximate air pressure at an altitude of 22 kilometers? A. 40 millibars B. 120 millibars C. 200 millibars D. 400 millibars 2. Which of the following weather observations would most likely cause meteorologists to predict rainy weather? A. high pressure B. northeast winds C. high relative humidity D. low relative humidity 3. Lines on a weather map that connect s of equal air pressure are A. isotherms B. isobars C. cold fronts D. warm fronts 4. The Earth's atmosphere is divided into layers based on A. precipitation B. temperature C. relative humidity D. composition

2 5. Breezes that blow from the land to the sea are A. prevailing westerlies B. trade winds C. land breezes D. sea breezes 6. Which of these is important in the formation of clouds? A. the relative length of day and night B. the Coriolis Effect C. the melting of the polar ice caps D. the cooling of air as it rises 7. Release of chlorofluorocarbons (CFCs) and similar compounds are a possible cause of A. destruction of ozone in the upper atmosphere B. acid rain in the northeast U.S. C. greenhouse gas build-up in the lower atmosphere D. increase in atmosphere carbon dioxide concentration 8. The atmospheric gas that traps the Sun's energy after it is re-emitted by the Earth, creating the greenhouse effect, is A. nitrogen B. oxygen C. argon D. carbon dioxide 9. People have tried many methods to artificially produce rain. One method, called cloud seeding, involves airplanes dropping particles of silver iodide onto clouds to help the clouds produce rain droplets. These silver iodide particles act as A. hail stones B. dew s C. electrical charges D. condensation nuclei

3 10. The instrument shown is used to record A. air temperature B. wind speed C. wind direction D. air pressure 11. The instrument shown is used to determine the A. wind speed B. wind direction C. amount of precipitation D. air pressure 12. An instrument used to record weather data at various elevations in the atmosphere is a A. thermometer B. barometer C. radiosonde D. wind vane 13. Land breezes and sea breezes are created by the differences in A. the tilt of the Earth s axis B. solar radiation reaching the Earth s surface C. the heat capacity between water and land D. the living organisms occurring in the land and sea

4 14. What is one of the major indications that the Earth s climate has varied over time? A. land forms carved by glaciers in temperate areas B. depletion of oxygen in lakes and rivers C. ocean currents D. magnetic reversals in layers of rock 15. A low level cloud formed by cooling of a layer of air and is referred to as fog is A. cumulus B. cumulonimbus C. stratus D. cirrus 16. Ozone molecules protect Earth from the harmful effects of the sun by A. insulating the temperatures at the poles B. condensing water particles in clouds C. regulating the heat from the sun D. absorbing ultraviolet radiation 17. The movement of heat energy from molecule to molecule by contact is A. radiations B. conduction C. convection D. precipitation 18. The storm with the strongest wind speeds is a A. anticyclone B. hurricane C. tornado D. monsoon 19. The movement of heat energy in warm and cool currents is A. conduction B. radiation C. convection D. evaporation

5 20. The ozone layer protects life on Earth from A. microsoft rays B. gamma rays C. infrared rays D. ultraviolet rays 21. A rain forest is found at the base of Mt. Kilimanjaro, and the summit is snowcapped. Which of the following would best account for this? A. temperature differences due to elevation changes B. climate differences due to seasonal changes C. differences in precipitation due to formation of a rain shadow D. climate changes due to changes in latitude 22. On weather maps, there are lines with tiny triangles on one side. This represents A. cold air moving in the direction the triangles B. cold air moving opposite the direction the triangles C. warm air moving in the direction the triangles D. warm air moving opposite the direction the triangles 23. The picture shows an infrared composite of the Earth as seen by a weather satellite system. What does the dark shaded area on this map represent? A. the moon s shadow B. thick cloud cover C. nighttime D. ocean currents

6 24. A large storm formed over water near the tropics is a A. tornado B. hurricane C. anticyclone D. monsoon 25. A low level cloud associated with fair weather is A. cumulus B. stratus C. altocumulus D. cirrus 26. The layer of the atmosphere where most weather occurs is the A. stratosphere B. thermosphere C. mesosphere D. troposphere 27. Moist air from the Pacific Ocean rises and cools as it passes from west to east over the Sierra Nevada Mountains. Once it is over the mountain range, the air descends and warms on the other side. What is the result of the air ascending, then descending over the mountains? A. desert on the west side of the mountains and heavy rains on the east side B. heavy rains on the west side of the mountains and desert on the east side C. heavy rains on the west side of the mountains and year-round snow on the east side D. desert on the east and west sides of the mountains and heavy rains on top of the mountains 28. What causes currents in the atmosphere? A. ocean waves and currents B. pressure from the atmosphere C. solar heating of the upper atmosphere D. warm air rising and cool air sinking

7 29. Warm rising air and cool sinking air is an example of which type of heat transfer? A. radiation B. conduction C. convection D. evaporation 30. The type of heat transfer responsible for the formation of clouds, storms, and winds is A. evaporation B. convection C. conduction D. radiation

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