| A | B |
|---|
| circumference | the distance around a circular object |
| core | the center of the earth |
| crust | the outside of the earth; the part we walk on |
| dissolve | one way to break a rock apart in water |
| geologist | a person who studies the Earth and the material it is made of |
| geology | the study of the Earth and what is made of |
| mantle | under the crust; it is made from rocks and minerals |
| mineral | an ingredient of rock that cannot be broken down any further |
| properties | shape, size, color, texture, hardness |
| rock | an earth material that is made up of many ingredients called minerals |
| scratch test | purpose is to see how hard a mineral is |
| fingernail, penny, and paperclip | 3 types of tools that were used for the scratch test |
| paperclip | the hardest tool used for the scratch test |
| rough, smooth, soft, hard, shiny | propertt words that can be used to describe a mineral |
| quartz | the hardest mineral that we studied |
| gypsum | the softest mineral on earth |
| diamond | the hardest mineral on earth |
| igneous rocks | form when melted rock cools than hardens |
| metamorphic rocks | form when heat or pressure changes rock |
| sedimentary rocks | form when layers of the sediment bond together |
