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science
chapter3 rocks
| Question | Answer |
|---|---|
| rocks | a hard material that composes of the earths crust or serface |
| minerals | the individual substances that make up rocks |
| fossil | any trace left in rock by a plant or animal |
| gemstones | small deposits of igneous and metamorphic crystals in a rock |
| precious stones | the rarest,most durable and beautiful gems |
| ore | a rock containing a metal together with impurities |
| fossil fuel | a fuel derived from the remains of once living things,such as coal |
| petroleum | crude oil |
| hydrocarbon | hydrogen and carbon mixed together |
| cave | any hole not dug out by man |
| speleology | study of caves |
| sea cave | a cave made by the sea |
| lava cave | a cave made by lava |
| solution cave | a cave dug out by water |
| magnetism | the force of a magnet |
| magnetic field | the field in which the magnet draws things in |
| poles | the spot on a magnet that is the strongest |
| electromagnet | a magnet powered by electronic waves |
| magnetosphere | the region of space affected by the earths magnetic field |
| a sedimentary rock | a rock that is formed by sediments that have been pressed together into a solid |
| limestone | the most common type of organic sedimentary rock made from calcium carbonate |
| coal | a rock that provides fuel |