2. Weather

3. The amount that air presses on the earth is called… Air pressure

4. Rain, snow, and hail are kinds of… Precipitation

5. The amount of water vapor in the air is called… Humidity

6. An area where cool air is sinking is a ….. High pressure area

7. A tool that shows wind direction is called a …. Wind vane

8. A large amount of air that has a certain temperature and humidity is called an… Air mass

9. To measure exact wind speed, scientists use this special tool: anemometer

10. Cool Fact: The National Weather Service has weather stations all over the United States.

11. An area where warm air is rising is a… low pressure area

12. A tool that measures precipitation is a … Rain gauge

13. A person that studies weather is called a…. meteorologist

14. The humidity in the air can be measured using a … hygrometer

15. A tool that measures air pressure is called a …. barometer

16. Two air masses meet at a line called a … front

17. A prediction of what the weather will be like is a …. Forecast

18. True or False? Water vapor evaporates as tiny water droplets to form a cloud. False

19. True or False? Cumulus clouds are rainy weather clouds. False

20. True or False? A hygrometer measures rainfall. False

21. How is the air above the earth warmed? Sunlight hits earth and warms it. The heat rises warming the air above.

22. Why is air pressure lower as you go high above the earth? There is LESS air!

23. How do weather forecasts help keep people safe? They issue watches and warnings for bad weather.

24. What is an air mass? A large body of air with the same temperature and humidity.

25. How do air masses usually move across the United States? From West to East

26. What is a front? The line where cold and warm air meet.

27. How do clouds form? When water vapor condenses and water droplets form a cloud.

28. What is humidity? The amount of moisture in the air

29. Why is the earth’s surface heated unevenly? The sunlight hits the earth at different angles.

30. What is one reason that it is usually warmer during summer days than during winter days? There are more hours of sunlight!

31. You all have done a great job learning about weather!