Standard 7 Review

Front

What is the youngest seafloor crust located closest to?

Back

The youngest seafloor crust is located closest to the mid-ocean ridges.

Front

What is the process called when new seafloor forms at mid-ocean ridges?

Back

The process is called Seafloor Spreading.

Front

What theory explains that continents were once part of a supercontinent called Pangaea?

Back

The theory is called Continental Drift.

Front

How do the magnetic stripes of the seafloor appear on either side of the mid-ocean ridge?

Back

The magnetic stripes appear symmetrical, like a mirror image.

Front

Who developed the theory of continental drift?

Back

Alfred Wegener is credited with developing the theory of continental drift.

Front

What is the definition of Seafloor Spreading?

Back

Seafloor Spreading is the process where magma rises at mid-ocean ridges, solidifies, and pushes older rock away.

Front

What evidence supports the theory of Continental Drift?

Back

Fossil distribution, geological similarities, and the fit of continental shapes support the theory.

Front

What is the significance of mid-ocean ridges?

Back

Mid-ocean ridges are significant as they are the sites of seafloor spreading and new crust formation.

Front

What happens to older seafloor crust as new crust forms?

Back

Older seafloor crust is pushed away from the mid-ocean ridges as new crust forms.

Front

What is subduction?

Back

Subduction is the process where one tectonic plate moves under another and sinks into the mantle.