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Across
  1. 5. in food CALORIE
  2. 6. from liquid to gas EVAPORATION
  3. 7. particle of an element ATOM
  4. 9. of chemicals and reactions CHEMISTRY
Down
  1. 1. that pulls objects toward Earth GRAVITY
  2. 2. by which plants make food PHOTOSYNTHESIS
  3. 3. material DNA
  4. 4. known as powerhouse of the cell MITOCHONDRIA
  5. 7. of living organisms BIOLOGY
  6. 8. unit of life CELL