7th Grade Science #2

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Across
  1. 1. collection of tissues that carry specialize function of the body
  2. 4. substance that forms in a chemical reaction
  3. 6. process of cell division forming 2 new nuclei with same # of chromosomes
  4. 9. cell organelles surrounded by 2 membranes that are the site of cellular respiration
  5. 10. smallest unit of a substance that keeps physical and chemical properties
  6. 11. diffusion of water through semipermeable membrane
Down
  1. 2. exchange of oxygen and carbon dioxide between living cells nd environment
  2. 3. organelle in which amino acids are hooked together to make proteins
  3. 5. substance or molecule that participates in a chemical reaction
  4. 7. organelle that digests food particles, waste, cell parts, and foreign invaders
  5. 8. an atom's central region which made of protons and neutrons