| A | B |
|---|
| IGNEOUS ROCK | A type of rock that forms from the cooling of molten rock at or below the surface. |
| SEDIMENTARY ROCK | A type of rock that is formed from sediments or pieces of other rock or the remains of plants and animals that are pressed and cemented together. |
| METAMORPHIC ROCK | A type of rock that forms from an existing rock that is changed by underground heat, pressure, or water. |
| SEDIMENT | Small, solid particles of material from rocks or organisms, which are moved by water or wind, resulting in erosion and deposition. |
| ROCK CYCLE | The process by which rocks change to form new rocks. The changes can be caused by many things, including heat, rain and snow, and underground pressure. |
| CONGLOMERATE | A type of rock formed from rounded pieces of other rock. |
| CRUST | The hard, outside layer of the earth. |
| FOSSIL | Remains or traces of an organism that lived long ago that are preserved in earth. |
| GEOLOGIST | A scientist who studies rocks and minerals to learn more about the history of our earth. |
| LAVA | Melted rock that erupts out of a volcano. |
| MAGMA | Melted rock that is underground. |
| MINERAL | A solid substance found in nature that has distinctive properties, such as a crystal form. |
| ROCK | Material found in nature that may be made up of one or more minerals; clay, sand, and other earth materials; and fossils. |
| SEDIMENT | Pieces of rocks, minerals, and organic materials that are carried by wind, water, or ice. |
| VOLCANO | An opening in the earth's crust through which lava, gases and other materials can flow. |
| CRYSTAL | A solid substance that has a definite shape or pattern. |
