Lesson 2 Development of a Theory Review

Front

What is seafloor spreading?

Back

Seafloor spreading is the process of the ocean floor expanding as new oceanic crust is created at mid-ocean ridges, helping to identify the age of the ocean floor.

Front

How does seafloor spreading help determine features on the ocean floor?

Back

Seafloor spreading helps identify underwater mountains and the age of the ocean floor.

Front

Is new seafloor more or less dense than older seafloor?

Back

New seafloor is less dense than older seafloor.

Front

What is the difference between lava and magma?

Back

Magma is found underground, while lava is on the surface.

Front

What does sonar equipment measure?

Back

Sonar equipment measures the depth of the ocean floor.

Front

What is the lithosphere?

Back

The lithosphere is the rigid outer layer of the Earth, consisting of the crust and upper mantle.

Front

What is the asthenosphere?

Back

The asthenosphere is the semi-fluid layer of the Earth's mantle beneath the lithosphere.

Front

How do tectonic plates move?

Back

Tectonic plates move due to convection currents in the mantle, causing them to drift apart, collide, or slide past each other.

Front

What is the role of tectonic plates in earthquakes?

Back

Tectonic plates can cause earthquakes when they interact at their boundaries, leading to stress accumulation and sudden release.

Front

What is a mid-ocean ridge?

Back

A mid-ocean ridge is an underwater mountain range formed by seafloor spreading, where new oceanic crust is created.