General Science

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Across
  1. 5. Basic unit of life
  2. 6. Smallest unit of matter
  3. 7. Process plants use to make food
  4. 11. Force pulling objects toward Earth
  5. 13. Scientist who discovered gravity
  6. 14. Element found in all living things
Down
  1. 1. Gas used in balloons
  2. 2. Green pigment in plants
  3. 3. Positively charged particle
  4. 4. Liquid turning into gas
  5. 8. Gas needed for breathing
  6. 9. Needed to do work
  7. 10. Force that resists motion
  8. 12. Smaller than bacteria
  9. 13. Cell that carries messages in the body