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Name: _________________________________________ Date: _______________ Page: _______________ Weather Test Study Guide I. Water Cycle Using the diagram to the right, label the parts of the water cycle. 1. 2. 3. 4. 5. 6. II. ____________________________ ____________________________ ____________________________ ____________________________ ____________________________ ____________________________ Precipitation 6 7. Precipitation forms when water droplets in the clouds become too _________ to stay afloat and fall to the ground. 8. This type of precipitation begins frozen and then melts before hitting Earth’s surface 9. This type of precipitation begins frozen, melts into rain as it falls and freezes when it hits something on the ground that colder. 10. This type of precipitation begins frozen, lands frozen, and lands as a crystal. 11. This type of precipitation begins frozen, partially melts, then refreezes into ice pellets before landing. 12. This type of precipitation is formed by ice being tossed around in the clouds with winds and causing it to grow in size. The ice pellets finally get too large to stay afloat and fall in frozen form. III. Humidity 13. What is humidity? __________________________________________________________________ 14. The warmer the air is, the _____________ water vapor it can hold. 15. A ______________ ______________ is used to measure relative humidity. 16. Using your relative humidity chart in your ILL, calculate the relative humidity of a dry bulb temperature of 18 degrees C with a wet bulb temperature of 15 degrees C. IV. Air Masses and Fronts 17. Warm air is less ___________ than colder air and __________ in the atmosphere. Rising moist air causes areas of ___________ pressure, creates clouds, and is associated with ________ weather. Name: _________________________________________ Date: _______________ Page: _______________ 18. Cool air is more ______________ than warmer air and ___________ in the atmosphere. Sinking dry air causes areas of _________ pressure, evaporates clouds, and is associated with _____________ weather. 19. Match the following fronts with their descriptions: _____ A warm air mass overtakes a cooler air mass leading to a long period of rain _____ A warm air mass is trapped between two colder air masses _____ A cold air mass overtakes a warmer air mass leading to stormy weather _____ A warm air mass and a cold air mass meet but neither move leading to several days of consistent weather V. a. cold b. warm c. stationary d. occluded Winds 20. Winds are caused by air molecules that move from an area of ___________ pressure toward an area of __________ pressure. 21. The _____________ ____________ describes how winds curve toward the equator. 22. Explain a sea breeze: ______________________________________________________________ 23. Explain a land breeze: ______________________________________________________________ VI. Clouds 24. What part of the water cycle is where clouds are created? __________________________ 25. What type of wispy cloud usually indicates that the weather will change within 24 hours? ___________________ 26. What type of cloud is associated with thunderstorms? _______________________________ VII. Severe Weather 27. Where do hurricanes form? _________________________________________________________ 28. What are two dangers from hurricanes? ____________________________________________________________________________________ ____________________________________________________________________________________ Name: _________________________________________ Date: _______________ Page: _______________ 29. Thunderstorms are caused by quickly rising ____________, ____________ air. 30. What are two things produced by a bolt of lightning? _______________________________ VIII. Weather Tools 31. Match the tool to its definition. _____ radar a. measures air pressure _____ weather balloon b. takes measurements in a single location on land (temperature, wind speed, etc.) _____ ground station c. sends information to Earth from orbit _____ satellite d. measures wind speed _____ weather planes & ships e. takes measurements over a large area and from different altitudes _____ anemometer f. measures relative humidity _____ psychrometer g. measures temperature _____ barometer h. takes measurements along a path; can be used to gather information from storms _____ thermometer i. one type is Doppler; detects air motion and precipitation