Across
- 6. a molecule made of carbon and oxygen atoms
- 11. body system that transports molecules to and from all cells of the body
- 12. a molecule that organisms get from the air or water around them
- 13. information about the natural world that is used to support or go against (refute) a claim
Down
- 1. category of large molecules that perform important functions inside living things
- 2. a molecule that organisms can use to release energy
- 3. a proposed answer to a question about the natural world
- 4. the body system that takes in oxygen and releases carbon dioxide
- 5. the body system that takes in food and breaks it down
- 7. molecules that are the building blocks of proteins
- 8. a type of energy storage molecule made of many glucose molecules connected together
- 9. a group of atoms joined together in a particular way
- 10. the body's use of molecules for energy and growth