Across
- 4. a single celled organism that can only be seen with a microscope
- 6. the process of changing from one form to another
- 7. a chemical change that changes substances into other substances
- 8. a substance that provides nourishment
- 11. a chemical reaction that produces sugar and oxegen
- 13. a dramatic change in apperance
- 14. a simple sugar produced by photosynthesis
Down
- 1. a single celled organism that lives in water
- 2. a multicellular organism that makes its own food through photo synthesis
- 3. substanses that are needed for a chemical reaction
- 5. substances formed as a result of chemical reactions
- 9. a combanation of two or more atoms
- 10. the smallest unit of an element
- 12. a pure substance that can't be broken down