Across
- 4. An ending substance that is made during a chemical reaction.
- 6. The relative size of things.
- 7. a pure substance that cannot be broken down by any physical or chemical means into simpler substances
- 8. Something that is made of all the same atoms or groups of atoms.
Down
- 1. Something that can be observed about a substance, such as color, smell, or boiling point.
- 2. To change the order or position of something.
- 3. The basic unit of a chemical element.
- 5. A starting substance that is part of a chemical reaction.