EARTH SCIENCE
FOSSILS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Fossils in which minerals replace all of an organism, or a part, such as a dinosaur bone
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The preserved remains of an organism
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A solid copy of the shape of an organism
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A megaladon:)
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Detailed explanation-1: -Petrified fossils result from permineralization, the replacement of once-living matter by minerals. Solutions containing silicates, carbonates, iron or other minerals seep into the gaps and spaces between the cells, first encasing the cells and eventually replacing the cells themselves.
Detailed explanation-2: -Petrified fossils form when minerals replace all or part of an organism. Water is full of dissolved minerals. It seeps through the layers of sediment to reach the dead organism. When the water evaporates, only the hardened minerals are left behind.
Detailed explanation-3: -Petrified fossils form when minerals replace the structure of an organism. This process, called permineralization, occurs when groundwater solutions saturate the remains of buried plants or animals. As the water evaporates the minerals remain, eventually filling in the spaces left as the organism slowly decays.
Detailed explanation-4: -But strictly speaking, a fossil is petrified only when additional minerals have been deposited in pores or cavities in the fossil, or when the fossil is entirely replaced by other material. Consider a piece of wood.