Seafloor Spreading/ Unit 1 Review

Front

What is seafloor spreading?

Back

The process of new earth being created by molten material from the mantle pushing upward to the surface and spreading apart.

Front

Who developed the theory of seafloor spreading?

Back

Harry Hess.

Front

How do scientists study the seafloor?

Back

By using sonar waves to map the ocean floor.

Front

Where is the youngest seafloor located in the Atlantic Ocean?

Back

The youngest seafloor is in the middle of the ocean.

Front

What is the role of tectonic plates in seafloor spreading?

Back

Tectonic plates move apart at mid-ocean ridges, allowing molten material to rise and create new seafloor.

Front

What is a mid-ocean ridge?

Back

An underwater mountain range formed by plate tectonics, where seafloor spreading occurs.

Front

What evidence supports the theory of seafloor spreading?

Back

Magnetic striping on the ocean floor and the age of rocks show patterns of seafloor spreading.

Front

What is the significance of sonar in oceanography?

Back

Sonar is used to map the ocean floor and study underwater features.

Front

What happens to the age of seafloor as you move away from a mid-ocean ridge?

Back

The age of the seafloor increases as you move away from the mid-ocean ridge.

Front

What is the relationship between seafloor spreading and earthquakes?

Back

Seafloor spreading can cause earthquakes as tectonic plates shift and move.