Across
- 1. A sign that a chemical reaction has happened is a change in _ _ _ _ _ _.
- 6. After a chemical change, the substance you are left with are what?
- 8. A shorthand way to represent a chemical change is to use a what?
- 9. Zinc only contains one type of atom so it is called a what?
- 11. Hydrogen and Carbon Dioxide are what?
Down
- 2. This is the process of reacting something with oxygen to create an oxide.
- 3. The substances you start with are called what?
- 4. Carbon Dioxide is make up of two elements, carbon and oxygen, so it is called a what?
- 5. For combustion to take place, you need a fuel, heat and what?
- 7. If a gas is formed in a chemical reaction you will see what?
- 10. Gravel is made up of different substances but you can easily separate them. This is called a what?