Volcanoes — Unit test Answers

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Which statement describes one of Wegener’s ideas that contributed to the theory of continental drift?

The continents drifted apart due to repeated meteor impacts.

The continents were once connected as one landmass.

The continents have moved apart very quickly due to earthquakes.

The continents are magnetically pulled toward or pushed away from one another.

The image shows a mountain peak in Asia.

compression

gravity

shearing

tension

The image shows the Great Rift Valley in Africa, an example of a rift valley.

The rift valley formed when the crust pulled apart.

The rift valley formed due to subduction.

The rift valley formed similarly to an island arc.

The rift valley formed at a convergent boundary.

How do geologists study direct evidence of Earth’s interior?

by collecting drill core samples of Earth’s crust

by measuring seismic wave activity

by analyzing how living things survive

by recording changes in climate patterns

Which statement describes one event that happens at deep-ocean trenches?

Crust is formed.

Mountains are formed.

Seafloor spreading occurs.

Denser plates slide under lighter plates.

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