| A | B |
|---|
| Rock | A solid piece of the Earth's surface and is made up of a combination of minerals. |
| Minerals | Basic building blocks of rocks and made up of one or more chemicals. |
| Luster | What is the shine of the rock. |
| Different kinds of luster. | Metallic, glassy, or dull. |
| Transparent | You are able to look through the rock and see details of an object behind it. |
| Translucent | Light can go through rock, but you can't see through it clearly. |
| Opaque | It blocks light completely. |
| Texture | To geologists, this refers to the size of pieces that make up a rock. |
| Geologist | A person who studies rocks. |
| Coarse | A texture of a rock in which the pieces are large enough to see when you hold it at arm's length. |
| Medium | A texutre of a rock in which pieces of a rock are so small you must use a hands lens to see them. |
| Fine | Texture of a rock in which using a hands lens doesn't make the pieces of the rock easy to see. |
