Science

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Across
  1. 3. Bones or hardened remains of a creature from long ago
  2. 4. A factor that prevent the growth of an ecosystem
  3. 7. A region of earth that has a particular climate and certain types of plants.
  4. 9. Organisms that eat already dead plants and animals
  5. 10. When something is made up of one cell.
  6. 11. The maximum population an ecosystem can reach
  7. 12. A process that involves change in the communities that live in an area
  8. 13. Events that happen over and over again
  9. 15. Trees that keep their leaves year-round
  10. 17. When something has more than one cell.
  11. 18. A model that shows the way energy moves in an ecosystem
  12. 19. A species that moves into an empty environment
Down
  1. 1. The continuous movement of carbon through Earth's environment and it's living things
  2. 2. The living things in an ecosystem
  3. 5. One of several periods in Earth's history when large numbers of species became extinct at nearly the same time
  4. 6. The continuous movment of water in an environment
  5. 8. Trees that lose leaves when winter comes and grow them back after
  6. 14. A model used to show a feeding relationship in which food chains overlap
  7. 16. Organisms that capture energy and store it in food
  8. 18. The scientific studies of how living things interact with each other and their environment