hi science is so fun

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Across
  1. 3. A gas produced during cellular respiration and fermentation
  2. 4. The element that forms the backbone of organic molecules
  3. 5. A type of respiration that requires oxygen
  4. 8. The layer of gases surrounding the Earth, containing carbon dioxide.
  5. 11. The metabolic process that builds larger molecules from smaller ones.
  6. 12. The sum of all chemical reactions in an organism
  7. 13. The gas required for aerobic respiration, produced during photosynthesis
  8. 14. The metabolic process that produces energy in cells.
Down
  1. 1. The process by which plants convert carbon dioxide into glucose using sunlight
  2. 2. The process that converts glucose into energy without oxygen
  3. 6. The metabolic process that breaks down larger molecules into smaller ones
  4. 7. A simple sugar that is a primary energy source for cells
  5. 9. A protein that accelerates chemical reactions in metabolic pathways
  6. 10. An enzyme that breaks down hydrogen peroxide