Ecosystems, Environment, and Energy

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Across
  1. 2. all of the interactions between energy sources in an ecosystem
  2. 3. a representation of a real object, idea, or concept that scientists use to explain something.
  3. 5. a model that shows all the different ways that energy can travel.
  4. 7. the envelope of gases that surround the Earth
  5. 9. a combination of two or more atoms in a particular way.
  6. 11. are organisms that eat meat.
  7. 12. a model that representS one path by which energy can travel through an ecosystem.
  8. 13. organisms that eat producers, primary consumers, and secondary consumers.
  9. 15. are organisms that break down dead material and return the nutrients to the soil.
  10. 16. the process of turning energy from the sun into food for plants.
  11. 18. all the water in the Earth in all its forms.
  12. 20. a pyramid where the base of the pyramid represents the producers in a food chain or a food web while each level above represents each group of consumers.
  13. 21. organisms that eat dead things
Down
  1. 1. water in all its forms in the Earth.
  2. 4. an organism that can produce its own energy.
  3. 6. organisms that eat both plants and animals.
  4. 8. in every step of the energy pyramid, only ten per cent of the original energy available in that energy level can be used in the next level.
  5. 10. are organisms that eat plants.
  6. 14. all the land and rocks in the Earth.
  7. 16. organisms that are able to make their own food.
  8. 17. the ability or capacity to do work.
  9. 19. the system in which all living things in the Earth exist.