Earth Vocabulary

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Across
  1. 4. how hot or cold something is
  2. 7. how much of something there is
  3. 8. the outside of something
Down
  1. 1. heat
  2. 2. the sun and the planets that move around it
  3. 3. provide what is needed for something
  4. 5. the world
  5. 6. the study of stars and planets