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10 Cards in this Set
- Front
- Back
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What is rock?
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solid, natural material made up of one or more minerals
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How is sedimentary rock formed?
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made from pieces of rocks and minerals, forms in layers with the oldest rock at the bottom
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How is igneous rock formed?
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forms when magma (molten rock inside the Earth) cools and hardens
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How is metamorphic rock formed?
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forms when heat, pressure, or chemical reactions change one type of rock into another type of rock
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What role does pressure have in the rock cycle?
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Pressure is involved in the formation of both sedimentary rock and metamorphic rock.
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You find a rock that contains a fossilized fern leaf. What type of rock is this?
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sedimentary
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How are fossils made?
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Fossils are made when an animal or plant is buried in soft mud.
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What is relative dating?
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Because sedimentary rock forms with the oldest layer at the bottom, scientists can learn the age of the layer and the materials found in it.
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Why do minerals have geometric shapes?
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Minerals are made of crystals, which are geometric because of the way their particls are arranged.
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We find a layer of rock that contains fossilized marine organisms. If the layer is in the middle of Ohio, what do we know about the area's history?
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At one time, the middle of Ohio was covered by salt water.
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