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Chapter II Test Name Hr. Understanding Weather Date: Total ____________/45 Percentage ____________ Grade ____________ I. MATCHING Match the correct definition with the correct term. Write the letter in the space provided. ____ 1. Amount of water vapor in the air ____ 2. Process in which liquid turns to vapor ____ 3. Area of high pressure where air moves apart and sinks ____ 4. The temperature to which air must cool to be saturated ____ 5. Process in which water vapor turns to liquid ____ 6. Area of low pressure where air masses meet and rise ____ 7. Area in which two types of air masses meet a. dew point b. anticyclone c. humidity d. evaporation e. front ab. condensation ac. cyclone II. MULTIPLE CHOICE Write the letter of the correct answer in the space provided. ____ 8. What kind of weather does a stationary front bring? a. b. c. d. ____ 9. If there is a tornado warning for your area, you should a. b. c. d. ____ find a high place to stay. go to a room with no windows. cover all your windows with plywood. not listen to the radio. 10. Which statement about tornadoes is correct? a. b. c. d. ____ freezing rain severe storms many days of cloudy, wet weather cold, dry weather They are a very common part of earthquakes. Seventy-five percent of the world’s tornadoes occur in the United States. Their danger is mainly from the heavy rains they bring. They are the strongest storms on Earth. 11. A storm surge is a dangerous part of a. b. c. d. 1. a tornado. a thunderstorm. the water cycle. a hurricane. ____ 12. Which describes a cumulonimbus cloud? a. b. c. d. ____ 13. Isobars help meteorologists by a. b. c. d. ____ a rising air mass. a source region. another positively charged area. a negatively charged area. 15. Meteorologists track cyclones and anticyclones because they a. b. c. d. ____ creating an image of weather systems. showing what form precipitation will take. measuring wind speeds. showing and connecting together high and low pressure areas. 14. Lightning is an electric discharge between a positively charged area and a. b. c. d. ____ high, light cloud puffy clouds stacked, dark, puffy mid-level clouds low light blanket of clouds high cloud made of ice crystals hold dangerous forms of precipitation. are required by law to map whether patterns as they occur. help meteorologists predict stormy or clear weather devote a great deal of time to their profession. 16. Which statement about hail is correct? a. b. c. d. It is rain that falls through different atmospheric layers. It may be sent up into the clouds many times. It forms in winter in low stratus clouds. It is a liquid form of precipitation. III. MATCHING Match the correct description with the correct term. Write the letter in the space provided. _____ 17. Tracks the location, movement, and amount of precipitation _____ 18. Consists of two thermometers _____ 19. Measures air temperature _____ 20. Measures wind speed _____ 21. Measures air pressure 2. a. anemometer b. radar c. barometer d. sling psychrometer e. thermometer IV. MATCHING Match the labels to the map. Write the letters in the space provided. SOURCE REGIONS FOR AIR MASSES THAT INFLUENCE WEATHER IN NORTH AMERICA ____ 22. mP ____ 23. cP ____ 24. mT ____ 25. cT V. True or False (A) or (B) 26. _________An air mass is a large body of air that has a similar temperature and moisture level throughout. 27. _________ A front is an area present due to global warming. 28. _________ A tornado develops when wind traveling in two different directions causes the air in the middle to rotate. 29. _________ When a hurricane moves over land it gains energy due to the prevailing Westerlies. 30. _________ Radar and satellites are used to help meteorologists forecast the weather. 3. VI. Matching: Use the word bank to the right to fill in the letter corresponding to the type of front. 31._________ 32._________ A. B. C. D. Cold Front Warm Front Occluded Front Stationary Front 33._________ 34.__________ VII. Reading Passage Water evaporates into the air from Earth’s surface. This water returns to Earth’s surface as Precipitation. Precipitation is water, in solid or liquid form that falls from the air to Earth. The four major types of precipitation are rain, snow, sleet, and hail. The most common form of precipitation is rain. A cloud produces rain when the cloud’s water drops become a certain size. A raindrop begins as a water droplet that is smaller than the period at the end of this sentence. Before a water drop falls as rain, it must become about 100 times its original size. Water drops get larger by joining with other water drops. When the water drops become too heavy, they fall as precipitation. 35. In this passage, what does precipitation mean? a. acceleration b. haste c. Water that falls from the atmosphere to Earth d. separating a substance from a solution as a solid 36. What is the main idea of he second paragraph? a. Rain occurs when the water droplets in clouds become large enough to fall. b. Water droplets fall to the ground c. Rain drops are very small at first. d. Rain is a form of precipitation 37. According to the passage, which step happens last in the formation of precipitation? a. Water evaporates into the air b. Water droplets fall to the ground c. Water turns to vapor d. Droplets grow in size. 4. Use figures 1 and 2 to answer questions 38-41. Figure 1 Figure 2 Dry-Bulb Wet-Bulb Temperature Temperature Depression (difference) DB DB -WB Day 1 Day 2 Day 3 Day 4 50°F 70°F 78°F 90°F WB 44° F 64° F 66° F 84° F Relative Humidity % % % % % 38. What is the relative humidity for day 1 a. 6 % c. 93% b. 62% d. 44% 39. What is the relative humidity for day 2 a. 72% c. 70% b. 7% d. 60% 40. What is the temperature for Day 3? a. 66° c. 78° b. 64° d. 12° 41. What is the temperature and relative humidity for day 4? a. Temperature = 90° Relative humidity = 90% b. Temperature = 90° Relative humidity = 78% c. Temperature = 84° Relative humidity = 78% d. Temperature = 78° Relative humidity = 70% 42. What instrument was used to determine the wet bulb and dry bulb reading? a. anemometer c. sling psychrometer b. thermometer d. wind vein 43. If caught outside during a tornado you should a. Head for the nearest tree c. Find an abandoned building for shelter b. Lie in a large open field or ditch d. Take shelter under a piece of farm equipment. 44. A tornado warning indicates that a. Conditions are present for a possible tornado b. You should keep an eye out the windows for possible activity c. You should take cover in the house attic d. You should take cover in the house basement 45. Before vapor can condense it must a. Gain energy b. Rise into the air c. Have a surface to adhere to d. Crystallize Answer Key to Chapter 2 Test. 1.c 2.d 3.b 4.a 5.ab 6.ac 7.e 8.c 9.b 10.b 11.d 12.b 13.d 14.d 15.c 16.b 17.b 18.d 19.e 20.a 21.c 22.d 23.a 24.c 25.b 26.a 27.b 28.a 29.b 30.a 31.b 32.a 33.d 34.c 35.c 36.a 37.b 38.b 39.a 40.c 41.b 42.c 43.b 44.d 45.c