CHEMISTRY

4. A long-chain molecule formed by the joining of many smaller and repeating molecules
8. A small amount of active molecules (such as acid) in a solution
9. A mixture of a solute dissolved in a chemical reaction
10. A reaction that involves oxygen and releases light and heat energy
12. A reaction in which an acid and base combine to produce a metal salt and water
13. A small molecule from which polymers are made
14. A substance that increases the rate of a reaction but is not used up in the reaction
15. A molecule that only contains carbon and hydrogen atoms

1. THEORY A theory stating that the particles involved in a chemical reaction must collide in order to react
2. An insoluble compound formed in a precipitation reaction
3. A strong acid readily releases a hydrogen ion in a chemical reaction, can also be used to describe the bond between different atoms
5. Process of joining of smaller units to form a long-chain molecule
6. Object or substance that can be broken down by bacteria, fungi and other living organisms
7. The breakdown is the separation of a chemical compound into elements or simpler compounds
10. The number of active molecules in a set volume of solution
11. A reaction that involves the building up of compounds by combining simpler substances, normally elements