Seafloor Spreading

Front

What is the process by which new ocean crust forms?

Back

Seafloor spreading.

Front

Where does sea-floor spreading begin?

Back

Mid-ocean ridge.

Front

What technology was used during WWII to detect enemy submarines and produce the first map of the seafloor?

Back

Sonar.

Front

What are Mid-Ocean Ridges?

Back

A chain of underwater mountains.

Front

What evidence supports the theory of seafloor spreading?

Back

Magnetic seafloor stripes and age of rocks.

Front

What is the significance of magnetic seafloor stripes?

Back

They provide evidence of seafloor spreading and the history of Earth's magnetic field.

Front

How do scientists determine the age of oceanic rocks?

Back

By analyzing the distance from the mid-ocean ridge and using radiometric dating.

Front

What role do tectonic plates play in seafloor spreading?

Back

Tectonic plates move apart at mid-ocean ridges, allowing magma to rise and form new crust.

Front

What is the relationship between seafloor spreading and continental drift?

Back

Seafloor spreading is a mechanism that explains how continents move apart.

Front

What geological features are commonly found at mid-ocean ridges?

Back

Volcanic activity and hydrothermal vents.