Lithosphere and Asthenosphere Flashcard

Front

What is the lithosphere?

Back

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

Front

What is the asthenosphere?

Back

The asthenosphere is the semi-fluid layer of the mantle located beneath the lithosphere, allowing for the movement of tectonic plates.

Front

What is the thickness of the lithosphere?

Back

The lithosphere is approximately 100 kilometers thick.

Front

What materials make up the lithosphere?

Back

The lithosphere is made up of brittle materials, including rocks and minerals.

Front

What is the composition of the asthenosphere?

Back

The asthenosphere is composed of plastic and flowable materials, allowing it to deform and flow.

Front

Where does lava originate?

Back

Lava comes from the mantle, which is the layer beneath the Earth's crust.

Front

Can solids flow? Give an example.

Back

Yes, some solids can flow under certain conditions. An example is toothpaste, which can flow when squeezed.

Front

What is the difference between the lithosphere and asthenosphere?

Back

The lithosphere is rigid and brittle, while the asthenosphere is semi-fluid and can flow.

Front

What role does the asthenosphere play in plate tectonics?

Back

The asthenosphere allows tectonic plates to move over it due to its plasticity.

Front

What happens to the lithosphere during tectonic activity?

Back

During tectonic activity, the lithosphere can break, shift, or deform, leading to earthquakes and volcanic activity.