Matter & Energy CW 2

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Across
  1. 7. _________ factors are nonliving things in an ecosystem
  2. 8. animals that are hunted
  3. 9. model showing the amount of energy available in each step of a food chain
  4. 11. process using chemical energy in matter to make food
  5. 12. layer of gases surrounding Earth
  6. 14. average weather conditions in an area over time
  7. 15. living and nonliving things in a given area
  8. 16. unicellular organisms without a membrane-bound nucleus
  9. 17. organisms that do not need to eat other organisms to obtain energy
  10. 18. process during which water vapor changes into liquid water
  11. 20. water that falls from clouds to Earth’s surface
  12. 21. process during which liquid water changes into water vapor
Down
  1. 1. __________ factors are living things in an ecosystem
  2. 2. series of chemical reactions that convert light energy, water, and carbon dioxide into the food-energy molecule glucose and give off oxygen
  3. 3. multi path model of energy transfer showing how the food chains in a community are interconnected
  4. 4. organisms that must eat other organisms for energy
  5. 5. animals that hunt other animals
  6. 6. single path model showing how energy flows in an ecosystem
  7. 10. to set free
  8. 13. cannot be separated by chemical means
  9. 19. process that changes atmospheric nitrogen into compounds usable by living things