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23 Cards in this Set
- Front
- Back
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Igneous rock
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Fire made, formed from hot , molten rock that has cooled and hardened
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Sedimentary rock
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Rock formed from bits or layers of rocks cemented together
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Metamorphic rock
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Rock that has been changed, by heat, pressure, or both
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Amber
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Hardened tree sap yellow to brown in color, often a source of insect fossils
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Imprint
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A mark made by pressing
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Mold
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A type of fossil that is a hollow form with a particular shape
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Cast
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A fossil formed or shaped within a mold
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Rock cycle
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A never ending process by which rocks are changed from one type to another
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Mineral
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A naturally occurring substance , neither a plant nor animal
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Relative age
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The age of something compared to the age of another thing
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Properties used to identify minerals
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Color, luster,streak plate, hardness
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Process in which wood and bone is petrified
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Minerals slowly seep into them and wood or bone may be dissolved and replaced by minerals
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How some fossils form
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Frozen, tar pits, sap covering, by being slowly dried out and becoming mummified, petrified , imprints mold cast amber
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How we use rocks
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To make cement, to build things, to mix with asphalt and pave roads, marble to make sculptures,
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Why it's important to preserve fossils
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So we can learn about the past
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Minerals
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Naturally occurring substance that are neither plants or animals
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Color
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Property of mineral , not always helpful
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Luster
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How light bounces off
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Streak
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Using a streakplate
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Hardness
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Property of a mineral
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How a mineral splits
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Property of a mineral
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Petrified
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Means turned to stone
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Ranch la brea in california
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Famous for tar pits
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