7TH GRADE REVIEW

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Across
  1. 3. Things that humans do.
  2. 5. A nonliving thing that affects the ecosystem.
  3. 7. Resources that exist in the environment without human intervention.
  4. 11. A natural, nonrenewable fuel such as coal, oil, or natural gas formed a very long time ago from the remains of living organisms.
  5. 12. On or of Earth
  6. 14. A self-contained living thing.
  7. 15. Proper disposal of used resources so they can be reproduced into new products.
  8. 17. A living thing that affects the ecosystem.
  9. 20. The sum of all living matter on Earth.
  10. 22. All the living and nonliving factors in an area.
  11. 24. The use of resources (e.g., fuels of food) by specific populations.
  12. 25. Continual rise in the average temperature of Earth’s climate system.
Down
  1. 1. an animal that eats other animals.
  2. 2. The layer of gas surrounding a plant that is held in place by gravity.
  3. 4. A group of interacting individuals of the same species located in the same area.
  4. 6. The Interaction between two animals in which one animal eats the other.
  5. 8. A group of organisms with similar characteristics that are able to interbreed or exchange genetic material.
  6. 9. A source of supply that benefits organisms.
  7. 10. Web Overlapping food chains with different pathways to show the flow of energy in an ecosystem.
  8. 13. A system comprising of biotic and abiotic factors in an area and all the interactions among them.
  9. 16. The number of different species of plants and animals in an area.
  10. 18. When more than one individual or population in an ecosystem relies on the same limited resources.
  11. 19. Long-term change in the prevailing weather patterns.
  12. 21. An organism that must consume other organisms for nutrients.
  13. 23. The permanent disappearance of a species from Earth.