Answers CV Q4 MJ Science 3 Adv 2002110 Compacted Review of Grade.7.Life for SSA PrepThe Fossil Record

The Fossil Record Answers

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According to the fossil record, which of these evolved after amphibians? Select two options.mammalsspongesfishbacteriareptiles

mammals

sponges

fish

bacteria

reptiles

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The diagram shows fossils buried in layers of sediment.

The fossil in layer Z is the youngest.

The fossils in layers Y and Z are younger than the fossil in layer V.

The fossil in layer Y is older than the fossil in layer W.

The fossil in layer X is older than the fossil in layer Z.

Which pair of elements can be used to determine the age of a fossil that is over one billion years old?

lead, which is radioactive, and uranium, which is stable

carbon, which is radioactive, and nitrogen, which is stable

argon, which is radioactive, and lead, which is stable

potassium, which is radioactive, and argon, which is stable

The diagram shows fossils buried in layers of rock.

Trilobites and gastropods are the youngest fossils.

Crinoids and gastropods have lived during the same time period.

Ferns have existed for a longer period of time than coral.

Every ammonite fossil is older than the gastropod fossils.

The diagram shows two different types of fossils from the same kind of ancient organism.

X: moldY: cast

X: castY: mold

X: traceY: imprint

X: imprintY: trace

Jonas drew a diagram to compare two types of fossils.

Involves minerals replacing remains of organism

Takes millions of years to form

Gives evidence of organism’s activity

Forms as sediment hardens

dating is the process of putting events or fossils in order from oldest to youngest without using actual dates.

Answer not available

How much time is needed to form most fossils?

a few months

a few years

hundreds of years

millions of years

A scientist is using relative dating to determine the age of a fossil that she discovered.What would allow her to draw the best conclusions about fossils that are younger than the one she discovered?

measuring the amount of carbon and nitrogen in the surrounding rock

measuring the amount of potassium and argon in the surrounding rock

finding fossils in the same area that are in layers deeper under the surface

finding fossils in the same area that are in layers closer to the surface

The diagram shows a football field that represents a geological time scale.Why are no organisms labeled between the end zone and 30 yard line on the left side of the field?

Scientists disagree about the fossils from this time period.

Scientists have not studied that part of the time scale.

There is very little fossil evidence for this time period.

There are too many fossils to name.

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The Fossil Record Answers

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