Easy Science Crossword

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Across
  1. 1. The study of life
  2. 6. The process plants use to make food using sunlight
  3. 7. The force that pulls objects toward Earth
  4. 9. The center of an atom
Down
  1. 2. The gas that humans need to breathe
  2. 3. The planet known as the Red Planet
  3. 4. The liquid that covers most of Earth’s surface
  4. 5. The closest star to Earth
  5. 8. The solid form of water