Across
- 5. the process by which a substance changes to produce one or more different substances
- 10. To arrange again in a different order
- 11. the relative size of something
- 12. In any chemical reaction, matter changes form; it is never created or destroyed
Down
- 1. A substance that is present at the start of a chemical reaction
- 2. matter with a composition that is always the same
- 3. A representation of an object or event
- 4. the way that something is put together or arranged
- 6. the smallest unit of matter
- 7. A substance created in a chemical reaction
- 8. to change in form or appearance
- 9. A characteristic used to describe something