Click a block that has a number to see the clue. Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.

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 Check 

Across: 1. ___________ currents are great rivers of seawater. 4. The side of the mountain that does not receive precipitation. 7. Condition of the atmosphere at a given time and place. 8. Amount of water vapor in the air. 10. Because of the ________ effect, the side of a mountain facing the wind will get precipitation. 12. A wind system that brings wet and dry weather. 14. The ______ Stream is a warm ocean current that flows along the US east coast. 15. Winds that blow from the same direction most of the time. 16. Measurement of heat. 17. Violent twisting spirals of air. 18. Height of Earth's surface above sea level - altitude.

Down: 2. Weather conditions over a long period of time. 3. Contact between 2 masses of air with different temperatures or different moisture levels. 5. The side of the mountain that faces the wind which gets the precipitation. 6. The rain _________ is the dry side of the mountain that faces away from the wind. 7. Global ______ is the process in which the earth grows warmer over a period of time. 8. Powerful and destructive tropical storms (winds reach 74 mph) 9. Name for a hurricane in the Pacific Ocean. 11. Area along the Equator with no prevailing winds. 13. The __________ effect is the process in which Earth's atmoshpere traps heat.