| A | B |
|---|
| coal | a type of fossil fuel that provides about 20% of the energy needs in the US |
| fossil fuel | a material formed from plant or animal remains that can be burned for energy |
| quarry | a mine, usually at the Earth's surface, from which certain rocks are removed |
| banded | metamorphic rocks that look like they contain thin layers |
| nonbanded | metamorphic rocks where the mineral grains have NOT been lined up by pressure |
| burial | metamorphism that causes the least amount of change. Temperatures and pressures affecting the rock are low. |
| regional | type of metamorphic rock that occurs deep below the surface where temperatures and pressures are high. |
| contact | type of metamorphism that happens when hot magma or lava comes in contact with rock. |
| metamorphic | new rocks that are made from existing rocks due to changes caused by heat, pressure, or chemicals |
| texture | the size and shape of mineral grains and the way they are arranged |
| fossil | any remains or evidence of an organism from the past |
| sedimentary | the type of rock where you are most likely to find a fossil |
| sedimentary rocks | rocks that form at the Earth's surface when pieces of existing rocks, minerals, and organic materials form layers and harden into rock |
| sediments | bits of rocks, minerals, or organic materials |
| claustic | type of sedimentary rock formed when pieces of rocks, organic materials, and minerals are cemented together. |
| cementation | binding, or gluing, of sediments |
| chemical | sedimentary rock that forms when water rich in dissolved minerals evaporate OR when chemical changes form new minerals |
| organic rock | sedimentary rocks that form from the remains of plants and animals or their parts. |
| rocks | made of minerals |
| igneous rocks | type of rock formed when hot, melted rock material cools and hardens |
| igneous | comes from the Latin word for "fire" |
| magma | molten rock material found within the Earth |
| lava | magma that reaches the Earth's surface |
| volcano | opening in the Earth's surface through which lava flows |
| rock cycle | series of changes that rocks undergo |
