1. Weather Vocabulary

2. The layer of air that surrounds our planet

3. atmosphere

4. Particles of air pressing down on the Earth’s surface

5. air pressure

6. The layer of the Earth’s atmosphere that is closest to the Earth

7. troposphere

8. The layer of the Earth’s atmosphere that contains the ozone

9. stratosphere

10. Sun The warming of the Earth caused by the atmosphere trapping thermal energy from the Sun

11. Greenhouse effect

12. huge body of air A huge body of air that has similar temperature and moisture

13. Air mass

14. The border where two air masses meet

15. Front

16. Wispy, high-altitude clouds that are made up of ice crystals *fair weather

17. cirrus

18. Puffy cotton-ball Puffy cotton-ball clouds that form when water droplets condense at middle altitudes

19. cumulus

20. Towering dark rain Towering dark rain clouds with a nimbus, or halo, of gray-white *thunderstorms, rain

21. cumulonimbus

22. Dark gray clouds Dark gray clouds that form a low layer and sometimes brings light rain or snow showers *blanket

23. stratus

24. Instrument that measures air pressure

25. barometer

26. The amount of water vapor in the air

27. Humidity

28. An instrument that measures moisture in the air

29. hygrometer

30. An instrument that is used to measure wind speed.

31. anemometer