Across
- 2. an organism that breaks down droppings or dead organisms
- 4. an animal that eats both plants and animals
- 6. tiny organisms that are too small to see without a microscope and can be found in the air, water, and soil, as well as inside other organisms
- 8. plant-like organisms, such as seaweed, that live in freshwater or salt water and have no flowers or roots
- 10. all the living and nonliving things in an area
- 11. a scientist who studies ecosystems
- 12. to stay alive
- 13. something taken in by plants and animals that helps them grow
- 14. a community of organisms together with its environment
Down
- 1. an animal that eats plants (or algae) and almost nothing else
- 3. a type of molecule that makes up air and that plants need in order to live
- 4. a living thing, such as a plant or an animal
- 5. the stuff that things are made of
- 7. the ability to make things move or change
- 9. a mixture of rocks, water, air, parts of dead organisms, and tiny living organisms
- 15. an animal that eats animals and almost nothing else
- 16. a group of atoms joined together in a particular way
