2. 1. What is a thin blanket of air that surrounds the Earth?

3. 2. What is the force of air pushing on an area called?

4. 3. Moving air is called __________.

5. 4. What is the condition of the atmosphere at a given time and place?

6. 5. What is a measure of how much moisture (water) is in the air?

7. 6. What weather instrument collects and measures the amount of rainfall?

8. 7. What is the pattern of weather in a place over a long period of time?

9. 8. What weather instrument measures wind speed?

10. 9. What weather instrument measures humidity?

11. 10. What weather instrument points the direction from which the wind is blowing?

12. 11. What weather instrument measures air pressure?

13. 12. What do you call the process in which water is heated and changes from a liquid to a gas?

14. 13. What do you call the process in which water vapor cools and changes from a gas into a liquid?

15. 14. What layer of the atmosphere is closest to Earth?

16. 15. What causes wind to blow?

17. 16. What kind of air weighs more?

18. 17. What kind of climate does Pennsylvania have?

19. 18. What are two things that affects climate? (Circle two)

20. 19. What is formed when water vapor condenses on the Earth’s surface?

21. 20. What is the most common type of precipitation?

22. 21. What kind of clouds form close to the ground and look like sheets or blankets of clouds?

23. 22. What kind of cloud is made of tiny bits of ice very high in the sky?