Vocab

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