Across
- 1. a consumer that eats both plants and animals
- 6. an invasive vine introduced to the southern United States
- 7. tiny decomposers that return nutrients to the soil
- 8. an animal that eats dead organisms but does not recycle nutrients
- 11. a chain reaction caused by one change in an ecosystem
- 14. when ecosystem parts are all in the right amounts
- 16. an organism that breaks down dead matter and returns nutrients to the soil
- 21. a nonliving factor that provides nutrients for plants
- 22. a term used to describe nonliving parts of an ecosystem
- 23. substances in soil (returned by decomposers) that help plants grow
- 26. a term used to describe living parts of an ecosystem
- 27. a consumer that eats only animals
- 28. a group of connected food chains
- 31. what living things need to grow, move, and survive (it's transferred in food chains and food webs)
- 32. a consumer that eats only plants
- 33. a type of decomposer that helps break down dead plants and animals
Down
- 2. a living thing introduced where it does not naturally belong
- 3. things organisms need to survive like food, water, and space
- 4. a long period with little or no rain
- 5. an animal that hunts other animals for food
- 9. something that changes an ecosystem from the outside
- 10. an event where land is covered with too much water
- 12. a simple, straight path that shows how energy moves between organisms
- 13. harmful materials that enter air, water, or soil
- 15. a symbol used to show the direction energy moves
- 17. an animal that is hunted and eaten by another animal
- 18. an organism that makes its own food using energy from the Sun
- 19. the number of members of one species living in the same area
- 20. the first source of energy for any ecosystem on Earth
- 24. a place where living and nonliving things work together
- 25. the variety of different living things in an ecosystem
- 29. an abiotic factor needed by all living things
- 30. an organism that must eat plants or animals to get energy