1. Which scientific finding would be excluded from a particular location’s fossil record?(1 point)

a jawbone of an ancient animal

plant imprints

the shell of a snail

a simple cell living organism


Which finding best supports the scientific explanation that an asteroid collision caused the extinction of dinosaurs?(1 point)

A.Many dinosaur skeletons are found in one particular rock layer.

B.Dinosaur bones are found at the bottom of a body of water.

C.Iridium is found in the same rock layer when dinosaurs became extinct.

D.Bodies of dinosaurs are found preserved in sap from plants.



Scientists are studying different fossils found in various rock layers at the same geographical location. Which theory about rock formation will best help the scientists to order the fossils according to age?(1 point)

A.Fossils found in rock layers that have been disturbed are oldest.

B.Fossils found in among numerous other fossils are most recent in age.

C.Fossils found in lower rock layers are older than fossils found in upper layers.

D.Fossils found in rock layers closest to Earth’s surface are the oldest.


Which statement best explains why the time periods in the geologic time scale are not even in length?(1 point)


A.Time periods are based on when important events happened in Earth’s history.

B.Time periods are based on the thickness of the individual rock layers of Earth.

C.Time periods are based on a different type of calendar used to track Earth’s history.

D.Time periods are based on the type of fossils found within the various rock layers of Earth.

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