Earth’s History

Front

What type of boundary occurs when two tectonic plates move apart?

Back

Divergent boundary.

Front

What is the process called when the ocean floor sinks beneath a deep-ocean trench and back into the mantle?

Back

Subduction.

Front

True or False: The Earth's crust is made of rock.

Back

True.

Front

What are the three main types of rock?

Back

Sedimentary, igneous, and metamorphic.

Front

Which type of rock is most likely to contain fossils?

Back

Sedimentary rock.

Front

What is the term for the movement of tectonic plates?

Back

Plate tectonics.

Front

What is the layer of the Earth that is made up of solid rock?

Back

The crust.

Front

What type of rock forms from the cooling and solidification of magma or lava?

Back

Igneous rock.

Front

What is the process called when rocks are broken down into smaller pieces?

Back

Weathering.

Front

What type of rock is formed under heat and pressure?

Back

Metamorphic rock.