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16 Cards in this Set
- Front
- Back
How does a fossil form?
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A fossil may form when a dead plant or animal is covered with sediment. A mold forms in sediment. The mold is filled with more sediment resulting in a cast, or impression, of a dead material. Other fossils are hard body parts. Some fossils have body parts repleced by minerals and become petrified.
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Your teacher asks you to find information about the rock cycle in your text book. Where could you quickly locate specific pages on this topic?
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Index
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Imprint
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a footprint or other track of an organism that has been preserved in rock.
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rain water that drains off lands
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runoff
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Physical weathering changes a rock's
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size and shape
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In what part of your science book can you find what chapters specific topics are covered as well as page numbers?
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Table of contents
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The earth's crust is made up of about twenty
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moving plates
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An oragnism can become a fossil if the organism is covered by
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sediment
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When water carries soil, sand, and rock
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erosion
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hollow left in sediment by an organism
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mold
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Petrify means
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to replace molecules in dead organisms with minerals, resulting in the obejct turning to stone.
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fossil formed by sediments filling a mold
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cast
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Cast
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a fossil formed by sediments filling a mold.
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Your teacher asks you to find the meaning of petrified, where could you quickly find the definition?
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Glossary
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The top layer of the earth is the
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crust
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dropping of sediments in another spot
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deposition
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