Across
- 1. air masses that form over the ocean
- 5. the movement of Earth in its orbit around the sun
- 7. a vertical cylinder of rotating air that develops in the updraft of a thunderstorm
- 8. the transfer of heated by mass movements or circulation
- 9. produces precipitation over a large area for an extended period of time
- 11. violent windstorms that take the formation of a rotating column of air
- 13. makes up 78% of the atmosphere
- 14. a mixture of gases that surrounds a planet, such as Earth
- 16. a storm that generates lightning and thunder
- 18. occurs when particles and gas molecules in the atmosphere reflect and bend solar rays
- 20. a boundary that separates two air masses of different properties
Down
- 2. includes all forms of energy that travel through space as waves
- 3. tropical cyclones that produce sustained winds of at least 119 km per hour
- 4. a gas molecule that is made up of three oxygen atoms
- 6. air masses that form over land are called
- 10. the lowest layer of the atmosphere where weather conditions exist
- 12. the coldest layer of the atmosphere
- 14. an immense body of air that is characterized by similar temperatures and moisture
- 15. the transfer of heat through matter by molecular activity
- 17. the spinning of the Earth around its axis
- 19. forms when cold dense air moves into a region occupied by warmer air