Across
- 2. | A combination of substances that are not chemically joined
- 6. | A reaction that gives off heat and light, like a campfire
- 8. | A change that makes a new substance
- 9. | A mixture where you can see the different parts
- 11. | When two or more elements join chemically, they form this
- 12. | Everything that has mass and takes up space
- 13. | The smallest part of an element
- 14. | When metal reacts with air and water, it turns reddish-brown
Down
- 1. | A clue that a chemical reaction has happened: color ________
- 3. | A substance made of only one kind of atom
- 4. | Another name for a homogeneous mixture
- 5. | A clue that a reaction is happening — bubbles form and a _____ is made
- 7. | Made of hydrogen and oxygen — a common compound
- 9. | A mixture that looks the same all the way through
- 10. | The gas we breathe that helps things burn