Seafloor Spreading

Front

What are the deepest parts of the ocean called?

Back

Trenches

Front

What happens to the rocks as you move farther from the Mid-Atlantic ridge?

Back

The rocks are consistently older.

Front

What is the rigid, outermost layer of Earth called?

Back

Lithosphere

Front

What evidence shows that continents have moved away from each other?

Back

Fossils of the same plants and animals are found on separate continents.

Front

Where is new seafloor material formed?

Back

At places in Earth's crust where magma rises into the spaces where tectonic plates pull away from one another.

Front

What is a divergent boundary?

Back

A tectonic plate boundary where two plates move away from each other.

Front

What is subduction?

Back

The process where one tectonic plate slides beneath another and is forced downward.

Front

What are tectonic plates?

Back

Large pieces of Earth's lithosphere that move and interact with each other.

Front

What is the Mid-Atlantic Ridge?

Back

An underwater mountain range formed by plate tectonics, where new oceanic crust is created.

Front

What is the significance of ocean trenches?

Back

They are the deepest parts of the ocean and are formed by subduction of tectonic plates.