Across
- 2. A type of rock
- 3. An element that makes up most of your body. It can also be found in air.
- 5. What is usually leftover after a chemical reaction
- 6. A chemical reaction where a more reactive element takes the place of another
- 8. How reactive an element is
- 9. Something created from a chemical reaction
Down
- 1. A reaction caused by heat
- 4. The starting elements in a chemical reaction
- 7. They can be made up of words or symbols. They also appear in maths.