Across
- 2. an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
- 3. an ending substance that is made during a chemical reaction
- 6. is made of all the same, or groups of the same, atoms
- 7. how relatively big or small something is
- 8. a process in which atoms rearrange to form new substances
- 9. something that can be observed about a substance, such as its color, smell, or boiling point
Down
- 1. a starting substance that is part of a chemical reaction
- 4. to change the order or position of something
- 5. everything is made of...