Across
- 1. - Substances that are combined to form products in a chemical reaction.
- 3. scientist - A scientist who uses chemical reactions to make new materials.
- 5. - The result of substances being combined in a chemical reaction.
- 6. engineer - A scientist who uses chemical reactions to solve problems.
- 7. - Characteristics of matter that can be used to identify substances.
- 8. - A chemical that makes a chemical reaction happen faster.
Down
- 2. - The smallest particle of matter made up of protons, neutrons, and electrons.
- 3. - More than one atom combined to form a substance (e.g., oxygen – O2).
- 4. change - A change in state of matter where no new substance is formed.
- 6. change - Chemicals combining to cause new substances to be formed.