Fossil Review CFA

During a field trip to a natural history museum, Claire, Praislynn, and Addyson observed various fossil exhibits. What are fossils primarily used for in scientific studies?

• Dating historical artifacts

• Finding patterns of changes in anatomical complexity

• Predicting future geological changes

• Mapping the ocean floors

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Trystan and Cash were debating which ancient living things are more likely to become fossils?

• Soft tissues

• Entire organisms

• Hard parts like bones and shells

• Plant leaves

Jacob asked Xavier how can evolutionary relationships be inferred from fossils?

• By the size of the fossils

• Through the type of rock they are found in

• By similarities or differences in anatomical structures

• Based on the depth they are buried

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Kaylee and Izzy wondered what is required for an organism to be classified under "Preserved Remains" in fossil preservation?

• The organism must be exposed to sunlight.

• The organism must be buried under deep sea sediments.

• The organism must be completely enclosed in some material like amber.

• The organism must be exposed to extreme cold.

During a classroom experiment, Maci and Harmani observed the process of forming Carbon Films fossils. What happens to gases and liquids in this process?

• Gases and liquids are preserved with the organism.

• Gases and liquids combine to form a mineral cast.

• Gases and liquids are pushed out due to heat and pressure.

• Gases and liquids are absorbed by the surrounding rock.

What is left behind in a Carbon Film type of fossil preservation?

• A detailed 3D replica of the organism.

• Only the bones of the organism.

• Only the carbon outline of the organism.

• The entire organism as it was when alive.

What is mineral replacement in the context of fossils?

• The process where living organisms replace minerals in rocks.

• The formation of new minerals in the bones of living organisms.

• Copies of organisms formed when minerals in groundwater fill the pore spaces of dead organisms.

• The replacement of old minerals with new ones in sedimentary rocks.

What are molds in paleontology?

• A type of fossil that forms from the hardening of tree sap.

• The impression in a rock left by an ancient organism, which hardens and turns to rock with an imprint.

• A replica of an organism created from mineral deposits.

• Preserved footprints of ancient animals.

What best describes casts in fossil formation?

• Direct preservation of animal remains through freezing.

• Impressions left by plant materials on rocks.

• Fossil copies of an organism made when a model of the organism is filled with sediment or mineral deposits.

• The process of forming new mineral layers over skeletal remains.

During a field trip, Colton, Hannah, and Scotty discovered various interesting formations in the sedimentary rocks. They came across some peculiar patterns and are curious to know: What are trace fossils?

• Fossils that form from the minerals replacing the organic material in an organism.

• The preserved evidence of the activity of an organism, such as tracks, footprints, and nests.

• Fossils that include only the bones and teeth of organisms.

• Impressions of leaves and seeds in rocks.