Earth Day

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Across
  1. 4. A mixture of gases that surrounds our planet; can be polluted from exhaust from vehicles or factories.
  2. 5. A process that allows the organic material in solid waste to be decomposed and reintroduced into the soil, often as fertilizer.
  3. 7. A group of similar organisms that can mate with each other and produce fertile offspring.
  4. 8. The disappearance of all members of a species from Earth
  5. 9. Waste materials from industry that are poisonous to humans or other living things
  6. 10. An area that provides an organism with its basic needs for survival.
Down
  1. 1. The total surroundings (living and nonliving) of an organism or a group of organisms.
  2. 2. Cutting down of forests leading to increased erosion and slower soil regeneration.
  3. 3. The process of making new products from materials that were used in another product.
  4. 6. The excessive use of material things, including food and natural resources