Chapter 8 Review Sci5

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Across
  1. 2. the gradual changes in a population of organisms in an ecosystem.
  2. 5. the process where plants use carbon dioxide and energy from the sun to form sugar and oxygen.
  3. 12. the process where water vapor leaves out of a plant.
  4. 14. a regular pattern of change
  5. 16. what happens to a population that could become endangered in the near future.
  6. 17. water water that soaks into the ground and is stored there.
Down
  1. 1. the process of water vapor turning back into a liquid.
  2. 3. regular divisions of the year
  3. 4. the process where organisms use sugar and oxygen to produce energy.
  4. 6. species plants and animals that originally live in an ecosystem.
  5. 7. the process of breaking down dead things so that the carbon is released back into the carbon cycle.
  6. 8. liquid water falling back to the Earth.
  7. 9. what happens to a species when its populations are so small that it may become extinct.
  8. 10. what happens to a species when the last known member dies.
  9. 11. the process of liquid water changing into a vapor, or gas.
  10. 13. any physical hazard to life caused by having too much or too little of something needed to survive.
  11. 15. species plants and animals that are not native to an area.