Bill Nye Space Crossword

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Across
  1. 3. Ten tons of what hit Earth each day.
  2. 6. A group of stars.
  3. 8. What travels 300,000 km every second?
  4. 10. Humans are made up of 65% of ______.
Down
  1. 1. Earth has a _____ of 40,000 km.
  2. 2. The red spot on Jupiter is a ___ bigger than Earth.
  3. 4. The North Star is also called _____.
  4. 5. A ______ is 9.5 trillion km.
  5. 7. What has a lot of iron and silicon.
  6. 9. What are made mostly from hydrogen and helium.