Volcanoes — Unit test Answers

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Which is one type of evidence that geologists usually study?

location of Earth in outer space

waves that move through Earth

interactions between living things on Earth

diversity of life found on Earth

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What causes the force that pushes magma from the magma chamber through the pipe and vent of a volcano?

gravity

water flow

expanding gases

convergent boundaries

What may occur when convergent boundaries interact?

formation of island chains

creation of mid-ocean ridges

creation of convection currents

formation of rift valleys

The image shows a mountain peak in Asia.

compression

gravity

shearing

tension

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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