SCI 100 Midterm review

Front

What is the geologic time scale used for?

Back

To organize Earth's history based on rock layers

Front

Which event marks the beginning of the Mesozoic Era?

Back

Breakup of the supercontinent Pangaea

Front

How do scientists determine the age of rock layers?

Back

By analyzing fossils found in the layers

Front

Fossils found in the lowest layers of sedimentary rock are:

Back

Older than fossils found in the higher layers

Front

What drives the movement of magma within Earth’s mantle?

Back

Convection currents caused by heat

Front

What happens when magma breaks through the crust, flows over Earth's surface, and cools?

Back

It forms new layers of rock on the surface.

Front

What occurs in Earth's mantle that causes the tectonic plates to move?

Back

Convection currents in the magma

Front

What effect does the cycling of magma in the mantle have on Earth's surface?

Back

It creates and moves continents.

Front

What is most responsible for the movement of Earth's tectonic plates?

Back

Convection currents in the mantle

Front

What type of plate boundary occurs when two plates slide past each other?

Back

Transform