Earth + Moon and Acids + Alkalis

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Across
  1. 2. Caused by the Earth's revolution around the Sun
  2. 3. The moon goes through _____ throughout the moon
  3. 5. Water is an acid: True or false?
  4. 7. A _____ moon looks like it is growing bigger
  5. 8. A ___ moon is a circle
  6. 9. A(n) ____ can turn litmus paper blue
  7. 12. The force keeping us on the ground
  8. 13. A ____ moon looks like it is growing smaller
  9. 15. ____ taste sour
  10. 16. Caused by an object blocking a light source
Down
  1. 1. Salt is neutral: True or false?
  2. 4. What the earth revolves on
  3. 6. The direction the Earth rotates about its axis on, and around the sun
  4. 8. Lemon is a base: True or false?
  5. 9. A(n) _____ can turn litmus paper red
  6. 10. The hottest planet
  7. 11. The planet we live on
  8. 14. A measure of matter
  9. 17. _____ taste bitter