| A | B |
|---|
| alloy | A mixture of metal minerals |
| atom | Tiny particle that makes up everything in the world |
| cement | A fine gray powder used to make concrete |
| conduct | to allow to pass through; to carry |
| core | center of the Earth |
| crust | thi layer of rock on the top of the Earth |
| crystal | solid with atoms that grow in a rectangular, repeated pattern |
| deposited | dropped or left behind |
| element | nonliving material made up of one type of atom |
| erosion | movement of rock pieces by wind, water, or ice |
| evaporate | to change from a liquid to a gas |
| fossil fuel | energy source, such as coal, oil, or natural gas, formed from the remains of dead plants and animals |
| geology | study of Earth and its features |
| igneous | rocks formed when hot liquid rock from within the Earth is cooled as it approaches or reaches the surface |
| lava | liquid rock above the Earth's surface |
| magma | liquid rock within the Earth |
| mantle | layer of Earth between the crust and the core |
| metamorphic | rock formed when igneous or sedimentary rocks change properties due to heat and/or pressure |
| mined | removed from the ground |
| mineral | nonliving substance made up of one or more elements |
| ore | mineral in which metal is found |
| organism | living thing |
| plate | large piece of the Earth's crust |
| rock | combination of two or more minerals |
| sediment | small pieces of rock, minerals, and soil carried by a body of water |
| sedimentary | rock formed when layers of sediment are pressed together |
| spring | source of water coming from the ground |
| weathering | process of breaking down rocks into smaller pieces |
