Space Jigsaw Reading Crossword

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Across
  1. 2. The Moon's gravitational pull causes _______
  2. 6. How much __________ objects contain influences gravitational attraction
  3. 7. As the Sun spins it also _______
  4. 8. Scientists think that gravity causes space to _______
  5. 9. 4.6 billion years is the age of ... (three words, no spaces)
  6. 12. ___________ are the small, rocky objects left from the solar system formation
  7. 15. _______ may have formed when a large meteor hit the Earth (two words, no space)
  8. 16. The Sun is a ball of glowing _____
  9. 17. The gases at the ________ of the Sun rotate faster than the gases at the poles
Down
  1. 1. Gravity ___________ with distance
  2. 3. An especially large collision caused the ... (two words, no space)
  3. 4. We have winter when the axis is tilted ____ from the sun
  4. 5. The planets orbit the Sun because of ________
  5. 10. How long were days on early Earth? (two words, no space)
  6. 11. Sun scientists trek to __________ to study the sun in the summer
  7. 13. Which planet's days are most similar in length to Earth's?
  8. 14. The axis tilt is the reason we have ...