Chapter 4 Weather Extra Credit Crossword

4. The change of state from a gas to a liquid.
6. A warm air mass that forms in the tropics and has low air pressure.
7. Fluffy, white clouds, usually with flat bottoms, that look like rounded piles of cotton.
9. A swirling center of low air pressure.
15. Clouds that form in flat layers and often cover much of the sky.
16. A line on a weather map that joins places that have the same temperature.
18. Scientists who study the causes of weather and try to predict it.
19. A violent disturbance in the atmosphere.
21. A line on a weather map that joins places that have a same air pressure.
24. A sudden spark, or energy discharge, caused when electrical charges jump between parts of a cloud, between nearby clouds, or between a cloud and the ground.
27. The process by which molecules at the surface of a liquid absorb enough energy to change to a gas.
29. The temperature at which condensation begins.
30. Wispy, feathery clouds made of ice crystals that form at high levels.
31. A long period of low precipitation.
32. Moving away temporarily from an area about to be affected by severe weather.
33. Bands of high-speed winds about 10 km above Earth’s surface.

1. The boundary where unlike air masses meet but do not mix.
2. A high-pressure center of dry air.
3. The percentage of water vapor in the air compared to the maximum amount of water vapor that air can contain at a particular temperature.
5. An overflowing of water in a normally dry area.
8. A small storm often accompanied by heavy precipitation and frequent thunder and lightning.
10. An instrument used to measure relative humidity.
11. A dry air mass that forms over land.
12. A rapidly whirling, funnel-shaped cloud that reaches down to touch Earth’s surface.
13. Any form of water that falls from clouds and reaches Earth’s surface as rain, snow, sleet or hail.
14. A huge body of air that has similar temperature, humidity, and air pressure at any given height.
17. A humid air mass that forms over oceans.
20. Cut off, as in a front where a warm air mass is caught between two cooler air masses.
22. A tropical storm that has winds of about 119 km/hr or higher.
23. The continual movement of water among Earth’s atmosphere, oceans, and land surface through evaporation, condensation, and precipitation.
25. The amount of water vapor in a given volume of air.
26. An instrument used to measure precipitation.
28. A cold air mass that forms north of 50⁰ north latitude or sound of 50⁰ south latitude and has high air pressure.