Across
- 3. - substance made of very large molecules (macromolecules) built from many repeating smaller units called monomers.
- 4. - A chemical substance used to destroy bacteria, viruses, and other harmful microorganisms on surfaces.
- 7. - is a naturally occurring, flammable, yellowblack liquid mixture of hydrocarbons found in the Earth’s rock formations.
- 8. - Harmful or unwanted substances that make something, such as water or soil, impure or unsafe.
- 10. - an organic polymer found in plants, used to make paper.
- 12. - A substance that is added to food or other products to prevent decay, spoilage, or the growth of bacteria.
Down
- 1. - A material that can conduct electricity under certain conditions.
- 2. - substances that reduce friction between moving machine parts.
- 5. - To make a substance chemically neutral, for example by reacting an acid with a base so that neither is strongly acidic nor basic.
- 6. – compounds that lower the surface tension of water, helping detergents clean better.
- 9. - The ability of soil to provide nutrients that help plants grow well.
- 11. chemistry – branch of chemistry that studies compounds containing carbon.