EARTH SCIENCE
FOSSILS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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cast
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mold
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trace
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petrified
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Detailed explanation-1: -Petrification is an example of an ALTERED body fossil. In this type of fossil, minerals replace the actual cells of the organism.
Detailed explanation-2: -A mold forms when hard parts of an organism are buried in sediment, such as sand, silt, or clay. The hard parts completely dissolve over time, leaving behind a hollow area with the organism’s shape.
Detailed explanation-3: -Molds & Casts Organisms get buried in sediment and decay away, leaving a cavity (mold). If that cavity gets filled in with sediment, a cast is made.
Detailed explanation-4: -Sometimes when an animal dies and its body decays, it can leave an imprint in the sediment. If this imprint fills in with minerals from sediment and groundwater, it can harden to form a fossil. This fossil is called a cast fossil.
Detailed explanation-5: -Molds and Casts The hard part might decay or dissolve, leaving behind a cavity in the rock called a mold.