Across
- 3. the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water
- 4. he process of changing the physical or chemical properties of a substance in order to make or produce something else:
- 6. to move from one place to another
- 9. the chemical element of atomic number 6, a non-metal which has two main forms (diamond and graphite) and which also occurs in impure form in charcoal, soot, and coal.
- 13. a scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact.
- 14. a substance produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction.
- 16. a substance that provides nourishment essential for the maintenance of life and for growth.
- 17. the process of digesting food
- 18. an abbreviation for carbon dioxide
- 19. a natural oily substance occurring in animal bodies
- 20. It is a polysaccharide which functions as a carbohydrate store and is an important constituent of the human diet.
Down
- 1. relating to, involving, or requiring free oxygen.
- 2. the action of breathing.
- 5. relating to or consisting of living cells.
- 7. any of a group of natural substances that are necessary in small amounts for the growth and good health of the body
- 8. one of the many substances found in food such as meat, cheese, fish, or eggs, that is necessary for the body to grow and be strong
- 10. relating to or requiring an absence of free oxygen.
- 11. the process of providing or obtaining the food necessary for health and growth.
- 12. a microscopic fungus
- 15. a chemical that your body needs to stay healthy: