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CHAPTER WEATHER PATTERNS 2 Vocabulary air pressure barometer weather wind global wind Coriolis effect jet stream monsoon evaporation condensation precipitation humidity saturation relative humidity dew point freezing rain sleet hail acid rain A. WHO AM I? 1. I’m the lumps or balls of ice that fall from cumulonimbus clouds. 2. I usually flow in the upper troposphere from west to east for thousands of kilometers. 3. I’m the small pellets of ice that form when rain passes through a layer of cold air. 4. I’m the horizontal movement of air. 5. I’m the process by which liquid changes into gas. 6. I’m the condition of Earth’s atmosphere at a particular time and place. 7. I’m any instrument that measures air pressure. 8. I tell us how close air is to saturation. 9. I’m the influence of Earth’s rotation, causing winds that travel a long distance to curve. 10. I’m rain that is affected by pollution and harms trees and lakes. 11. I’m any type of liquid or solid water that falls to Earth’s surface. 12. I’m the force of air molecules pushing on an area. Copyright © by McDougal Littell, a division of Houghton Mifflin Company CHAPTER 2 Weather Patterns Write the vocabulary word on the line that the clue describes. 128 EARTH’S ATMOSPHERE, CHAPTER 2, VOCABULARY PRACTICE 126-130-sean-urb-d02-cr+vp+ds 128 3/4/04, 4:10:26 PM I travel thousands of kilometers in steady patterns. 14. I’m the temperature at which air reaches saturation. 15. I’m the raindrops that cover surfaces with a coating of ice. 16. I’m wind that changes direction with the seasons. 17. I’m the process by which a gas changes into liquid. 18. I’m the amount of water vapor in the air. 19. I’m the point at which the rates of evaporation and condensation are equal. CHAPTER 2 Weather Patterns 13. B. TYING WORDS TOGETHER Copyright © by McDougal Littell, a division of Houghton Mifflin Company Use each group of three words together in a sentence or two that help to explain weather. 20. acid rain / wind / precipitation 21. freezing rain / sleet / hail 22. evaporation / condensation / precipitation 23. air pressure / weather / wind 24. monsoons / precipitation / air pressure 25. jet streams / weather / wind 26. humidity / relative humidity / dew point EARTH’S ATMOSPHERE, CHAPTER 2, VOCABULARY PRACTICE 129 126-130-sean-urb-d02-cr+vp+ds 129 3/4/04, 4:10:36 PM