Science

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Across
  1. 2. Living
  2. 7. The sphere of the Earth that includes all living organisms.
  3. 8. The gaseous layer that surrounds the Earth.
  4. 9. Amount of something
  5. 10. The process by which plants take in carbon dioxide and release oxygen.
  6. 12. The process by which carbon is exchanged between the atmosphere, oceans, and living organisms.
  7. 14. A community of living organisms interacting with each other and their environment.
Down
  1. 1. The variety and variability of lifeforms on Earth
  2. 3. The solid core of the Earth, mostly made of iron and nickel.
  3. 4. Layer of the Earth that consists of molten rock beneath the crust.
  4. 5. Not living
  5. 6. Certain amount of species in a certain area
  6. 11. The relative size, extent, or level of measurement of something
  7. 13. The Earth's outermost layer, made of solid rock.