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Earth Day Challenge Crossword

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Across
  1. 2. A process that allows the organic material in solid waste to be decomposed and reintroduced into the soil, often as fertilizer.
  2. 4. The number of people (or other animals) in an area exceeds the capacity of the environment to support life at a decent standard of living.
  3. 7. The warming of the earth's temperature caused by depletion of the ozone layer and the greenhouse effect; also referred to as Climate Change
  4. 10. The excessive use of material things, including food and natural resources
  5. 13. Lliving a life that only uses what is needed and readily available
  6. 14. The disappearance of all members of a species from Earth
  7. 16. Species that normally live and thrive in a particular ecosystem
  8. 17. A species that influences the survival of many other species in an ecosystem
  9. 18. A day first organized in 1970 about celebrating and caring for the Earth
  10. 20. Damage done to a habitat either by a natural disaster or human activities
  11. 21. The solid part of the earth consisting of the crust and outer mantle where many natural resources can be found
  12. 22. The process of making new products from materials that were used in another product.
  13. 23. Cutting down of forests leading to increased erosion and slower soil regeneration.
Down
  1. 1. The increase in chemical concentration in animal tissues as the chemical moves up the food chain to the top-level consumers
  2. 3. A natural resource that is not replaced in a useful time frame.
  3. 5. to use less of something, such as carpooling or limiting how many plastic bottles you use
  4. 6. The variety of life in the world or in a particular habitat or ecosystem.
  5. 8. Speaks for the trees
  6. 9. Species with a small population that are in danger of becoming extinct
  7. 11. Release of harmful materials into the environment; examples include air, water, soil, light, noise
  8. 12. Coal, oil, natural gas, and other fuels that are ancient remains of plants and animals.
  9. 13. Author of the book from 1971 that illustrated many harmful effects of industry and humans on ecosystems
  10. 15. Plants and animals that have migrated to places where they are not native and do not have limiting factors to keep their populations in check
  11. 19. Natural resource that can be replaced at the same rate at which the resource is consumed