Chapter 15-16 Crossword

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Across
  1. 3. Streams Narrow belts of high-speed winds that blow in the upper troposphere and lower strato sphere.
  2. 5. Process by which a gas, such as water vapor, becomes a liquid.
  3. 7. Small, intense weather systems that produce strong winds, heavy rain, lightning, and thunder.
  4. 9. Mixture of gases that surrounds Earth.
  5. 12. The uppermost atmospheric layer.
  6. 15. Pollution Contamination of the atmosphere by the introduction of pollutants from human and natural sources.
  7. 16. The lowest layer of the atmosphere, which lies next to the Earth’s surface.
  8. 17. The area in which two types of air masses meet.
Down
  1. 1. Electric discharge that occurs between a positively charged area and a negatively charged area.
  2. 2. Water, in solid or liquid form, that falls from the air to Earth.
  3. 4. Cycle Continuous movement of water from sources on Earth’s surface.
  4. 6. Condition of the atmosphere at a certain time and place.
  5. 8. The atmospheric layer above the troposphere.
  6. 10. Small, spinning column of air that has high wind speeds and low central pressure and that touches the ground.
  7. 11. A large, rotating tropical weather system that has wind speeds of at least 120 km/h.
  8. 13. Middle layer of the atmosphere.
  9. 14. The amount of water vapor in the air.