Cells and Respiration Crossword

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Across
  1. 1. a colourless, odourless reactive gas
  2. 4. space or vesicle within the cytoplasm of a cell
  3. 6. The lens or group of lenses that is closest to the eye in a microscope.
  4. 8. a thick solution that fills each cell and is enclosed by the cell membrane.
  5. 15. any of a number of organized or specialized structures within a living cell.
  6. 16. the semipermeable membrane surrounding the cytoplasm of a cell.
  7. 17. instrument used for viewing very small objects.
  8. 18. Light that comes from the sun.
  9. 19. The brain of the cell.
  10. 20. a colourless, transparent, odourless liquid that forms the seas.
Down
  1. 2. a simple sugar which is an important energy source in living organisms.
  2. 3. the strength and vitality required for sustained physical or mental activity.
  3. 5. Is a chemical reaction that happenes in all living cells.
  4. 7. Is the process by which plants use sunlight.
  5. 9. a raised plate on which a slide or object is placed for examination.
  6. 10. The organelle where photosynthesis occure
  7. 11. The basic building block of all living things
  8. 12. A wall surrounding a cell to give protection
  9. 13. Dioxide a colourless, odourless gas produced by burning carbon.
  10. 14. Where the processes of respiration and energy production occur.