Across
- 4. Reactions that absorb energy
- 7. Is what you start with
- 8. A system that can exchange both energy and matter with its surrounding
- 10. Reactants that absorb energy
- 11. A substance that speeds up a chemical reaction.
- 12. What you end with
Down
- 1. A short easy way to show a chemical reaction using symbols
- 2. Number that is in frount of an equation.
- 3. A rule that says that mass is neither created nor destroyed
- 5. Small number found to the right of each element
- 6. A solid formed by a change in a solution.
- 9. reaction a process that leads to the chemical transformation of one set if chemical substances to another.
- 11. A system that can only exchange energy with its surrounding, not matter.