Across
- 2. energy from sunlight
- 4. plankton are tiny plants and animals that live in the
- 5. an animal that lives in the sea
- 6. a hard material that forms parts of a skeloton in many
- 8. when you connect one thing to another thing
- 10. a substance found in plants that enables them to
- 12. a part of something
Down
- 1. a struggle among plants and animals for food water
- 3. to live in a place
- 7. an animal that live in the sea
- 9. living space
- 11. one of a kind rare or uncommon