Vocabulary

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Across
  1. 1. the outside
  2. 4. system earth and the planets that move around the sun
  3. 7. provide what they need
  4. 8. it tells how hot or cold the thing is
Down
  1. 2. the study of stars and planets
  2. 3. heat
  3. 5. How much of that thing there is
  4. 6. the world