Lab: Modeling Water Erosion — Unit test Answers…

How do index fossils help scientists?

They aid in the study of ranges of different organisms.

They advance understanding of the origin of life on Earth.

They aid in comparison of rock layers at distant locations.

They advance understanding of rock type at the time the organism lived.

Which two continents contain fossils of Mesosaurus, an extinct reptile, in similar regions of Pangaea?

Africa and South America

Eurasia and Africa

Australia and Eurasia

North America and Australia

In Wegener's view, what caused mountain ranges to form?

volcanoes

Earth shrinking

meteorite impacts

continents colliding

Which statement explains one reason why unconformities occur?

Rocks along a fault break and move.

Igneous rock forms at Earth’s surface.

No sediment is deposited over a long time.

Igneous rock forms between sedimentary layers.

Which phrase describes the absolute age of a rock?

does not provide an exact age

is the number of years since it formed

is the age compared to other rocks around it

indicates whether it is younger or older than the rocks above it

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