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18 Cards in this Set
- Front
- Back
What is a rock cycle?
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The sequence of processes that change rocks from one type to another over long periods.
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What is a mineral?
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A solid nonliving substance that occurs naturally in rocks or in the ground.
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What is an igneous rock?
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A type of rock that forms from melted rock that cools and hardens.
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What is the physical property, texture?
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The way something feels.
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What is a streak?
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A physical property of a mineral.
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How is a streak test performed?
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When you rub a mineral across a surface, the mineral leaves a streak of powder.This colored streak can help scientists identify two minerals that look alike.
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What is a rock?
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a solid substance made of minerals
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One way that rocks and minerals are similar.
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Rock can be made of many minerals or of one mineral with different-sized grains.
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What is a metamorphic rock?
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rock that has changed from another type of rock. High temperature and pressure form this type of rock.
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What is sedimentary rock?
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A type of rock that forms when layers of sediment are pressed together.
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What is sediment?
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Sediment is pieces of rock that have been broken down and moved.
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What are the three different groups in which rocks are classified?
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1. Igneous
2.Sedimentary 3. Metamorphic |
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How are igneous rocks formed?
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Igneous rocks are formed when melted rock cools and hardens.
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How are sedimentary rocks formed?
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Sedimentary rocks are formed when layers of sediment are pressed together.
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How are metamorphic rocks formed?
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Metamorphic rocks are formed when high temperature or pressure change a rock.
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How can a streak test help identify a rock as being Gold or Pyrite?
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Gold leaves a golden streak. Pyrite’s streak is greenish black.
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What is one way that rocks and minerals are similar?
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A rock is a mixture of one or more minerals.
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What is one way that rocks and minerals are different?
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Minerals are pure ad the color is usually the same. Rocks are made up of different minerals and have different colors.
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