Human Influences on Ecosystems

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Across
  1. 6. Doing something in a way that uses the least time, energy, or resources.
  2. 8. A substance added to soil to help plants grow better by giving them nutrients.
  3. 10. A chemical used to kill insects that damage crops.
Down
  1. 1. Growing only one type of crop in a large area.
  2. 2. When plants or animals try to get the same resources like light, water, or food.
  3. 3. A chemical used to kill weeds that compete with crops.
  4. 4. Carefully chosen; used when picking the best animals or plants for breeding.
  5. 5. The process of producing new plants or animals, often by choosing the best ones.
  6. 7. Farm animals such as cows, pigs, chickens, and sheep.
  7. 9. The amount of crops or food produced.