Space Jigsaw Reading Crossword

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