11.1 What is ecology?

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Across
  1. 7. everything that surrounds an organism and acts upon it
  2. 9. Scientist who studies ecology
  3. 10. study of the relationship between living things & their environment
  4. 11. __ get their oxygen from the dissolved oxygen in water
  5. 12. Many ___ get their nutrients & energy by eating plants
  6. 13. If there are too many gulls hunting snails, their numbers will ___
Down
  1. 1. The __ snail leaves wastes in the soil that enrich the soil
  2. 2. Plants take in ___ dioxide from the air & use it with sunlight to make their own food
  3. 3. Green plants get ___ and water from the soil
  4. 4. All living things need ___ to carry out their life processes
  5. 5. the __ soil makes grasses grow better
  6. 6. process of organisms acting upon one another or on the nonliving parts of their environment
  7. 8. Many animals get their ___ from the air