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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 |