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Name: Meteorology Benchmark Study Guide Answer Key 1. Large cumulonimbus clouds are forming and the barometer is falling, what type of weather can you predict? Thunderstorms 2. How does cloud temperature affect snow formation? Temperature affects snowflake formation. 3. What two processes must occur to water to produce frost on the grass in the morning? Condensation and freezing 4. What is the warmest climate zone? Tropical 5. Land breezes occur because _land cools off faster than water? 6. Where is a good place to seek shelter when a tornado is approaching? _basement, lowest point with no windows 7. Because ozone in the ozone layer absorbs ultraviolet radiation it is (warmer/cooler) than the layers surrounding it? warmer 8. What layer of the atmosphere is the closest to the earth’s surface? troposphere 9. Cold air masses that form at high latitudes are called polar air masses 10. The sun’s rays are least direct near the ____poles___________. 11. The seasons are caused by the tilt of __the earth’s axis.______. 12. The two main factors that determine the climate of a region are? 1. temperature____2.___precipitation___________ 13. Why has weather forecasting improved over the last decade? Computers, technology_ 14. A hurricane that forms around the equator in the Atlantic Ocean would most likely hit what region of the United States? Southeastern 15. Why are there more hurricanes than usual some years? Ocean water is warmer. the land or water that it forms over. Example: continental polar 16. An air mass gets its temperature and humidity from 17. How does the jet stream impact changing weather conditions in an area? Moving large air masses. Dark clouds, thunder, strong winds. A decrease in the barometric pressure. 18. What is the best indication of an approaching storm? 19. How might the weather differ between a valley and a mountain when precipitation is occurring? It could be raining in the valley and snowing in the mountains, altitude affect temperature and precipitation. 20. Winds occur due to differences in temperature of the surface of the earth. Air pressure. 21. What type of air is typical of a tropical climate? Warm and moist. 22. Large, dark clouds that produce thunderstorms are called cumulonimbus. 23. Warm, moist air mush be present before a hurricanes can develop over the ocean. 24. What safety steps should you take when a thunderstorm is approaching?___ seek shelter, stay inside, avoid tall objects and bodies of water. 25. When a cold air mass moves into a warm air mass, causing a cold front, what happens to the warm air mass? Cold air pushes warm air up. 26. What is a hurricane and how do they form? A large storm forming over warm waters. 27. What is water vapor? H2O in a gaseous state. H:\Science\2009-2010\Meteorology Updated 022310