7.3 Practice

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Across
  1. 4. A ___________ can bring several days of cloudy skies and light rain because neither air mass moves.
  2. 5. The increase in greenhouse gases is one major cause of ___________.
  3. 8. The ___________ push weather systems across the United States from west to east.
  4. 9. The heavy snow and powerful winds made traveling impossible during the ___________.
  5. 11. A ___________ forms where two air masses meet and weather conditions begin to change.
  6. 12. Airplanes often fly with the ___________ to save fuel and reach their destinations faster.
  7. 13. Stormy and rainy weather usually happens when a ___________ forms overhead.
  8. 14. When a ___________ moves through, temperatures drop quickly and thunderstorms often form.
  9. 16. The desert’s dry and hot ___________ makes it difficult for many plants to survive.
  10. 17. A ___________ marks the boundary between two air masses and often signals changing weather conditions.
  11. 18. Sailors once relied on the steady ___________ near the equator to cross the ocean efficiently.
  12. 21. Because of the ___________, winds curve to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.
  13. 22. Scientists study ___________ to understand how temperature and rainfall change around the world over long periods.
  14. 23. On a summer day, high ___________ makes the air feel sticky and uncomfortable.
Down
  1. 1. Global ___________ helps distribute heat from the equator toward the poles through moving air currents.
  2. 2. An ___________ can cause days of rain when a cold front overtakes a warm front and lifts the warm air upward.
  3. 3. Clear skies and dry weather usually occur when a ___________ moves into the area.
  4. 6. The warm waters of the Gulf Stream are an example of an ___________ that affects the climate of nearby coasts.
  5. 7. A ___________ brings gentle rain and rising temperatures as warm air glides over colder air.
  6. 10. Warm air rising and cool air sinking creates a ___________ that moves heat through the atmosphere.
  7. 15. Water has a high ___________, meaning it takes longer to heat up or cool down compared to land.
  8. 19. A large ___________ of air can cover thousands of miles and bring similar temperature and humidity to a region.
  9. 20. The ___________ keeps Earth warm by trapping heat from the sun within the atmosphere.