Unit 4 vocabulary (Third Edition Solutions)

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Across
  1. 2. To come closer to something or someone.
  2. 7. A light fog that makes it hard to see far.
  3. 11. Weather with short periods of rain.
  4. 12. Changes in the world's weather over a long time.
  5. 13. caps: Thick ice that covers large areas, like at the North and South Poles.
  6. 14. To take care of someone or something.
  7. 15. A small, soft piece of snow that falls from the sky.
  8. 16. To give off light, like the sun or a lamp.
  9. 17. The light from the sun.
  10. 18. A hard, flat surface where people walk beside the road.
  11. 20. A thin, icy layer that forms when it is very cold outside.
  12. 21. A big sign or board used to show advertisements.
  13. 22. Small balls of ice that fall from the sky like rain.
  14. 23. How high the surface of the ocean is.
  15. 24. When there is a lot of wind blowing.
  16. 25. The loud noise you hear after a flash of lightning in a storm.
Down
  1. 1. A very big wave in the sea caused by an earthquake or volcano.
  2. 3. Energy that comes from natural sources like the sun or wind and can be used again and again.
  3. 4. A time when there is not enough food for people to eat.
  4. 5. A lot of wet earth moving quickly down a hill.
  5. 6. Fuels like coal, oil, or gas that come from the ground and were formed millions of years ago.
  6. 8. A storm with thunder, lightning, and sometimes rain.
  7. 9. A large amount of snow and ice falling down a mountain.
  8. 10. A long time with very little or no rain.
  9. 19. When hot rocks, ash, and lava come out of a volcano.