science

4. A number in front of a chemical formula that indicates the number of molecules or atoms involved.
7. Substances that undergo a chemical change in a reaction.
12. The act of ensuring both sides of a chemical equation have the same number of atoms.
13. Relating to substances and their properties or reactions.
14. A process in which one or more substances are converted into different substances.

1. A substance that speeds up a chemical reaction without being consumed.
2. A reaction that absorbs heat energy.
3. The substances formed as a result of a chemical reaction.
5. Principle stating that mass is neither created nor destroyed in a chemical reaction.
6. The amount of matter in an object, which is conserved in chemical reactions.
8. A reaction that releases heat energy.
9. A representation of a chemical reaction using symbols and formulas.
10. A scientific principle that describes a consistent relationship in nature.
11. The capacity to do work, often involved in chemical reactions