Earth's Internal Heat and Composition Flashcard

Front

What is the primary reason Earth is still very hot inside despite cooling since its formation?

Back

Radioactive decay is releasing heat within the Earth.

Front

What is the 'heat of formation' in relation to Earth's internal heat?

Back

It is one of the sources of Earth's internal heat, along with radioactive decay.

Front

What are the properties of the asthenosphere and why are they important to plate tectonics?

Back

The asthenosphere is semi-solid, allowing tectonic plates to move.

Front

What is the primary composition of the Earth?

Back

Rock.

Front

What is the lithosphere?

Back

The lithosphere is the sublayer made up of the crust and upper mantle.

Front

What role does radioactive decay play in Earth's internal heat?

Back

Radioactive decay releases heat, contributing to the Earth's internal temperature.

Front

How does the heat of formation contribute to Earth's internal temperature?

Back

It is the heat generated during the formation of the Earth, contributing to its internal heat.

Front

What is the difference between the lithosphere and asthenosphere?

Back

The lithosphere is rigid and includes the crust and upper mantle, while the asthenosphere is semi-solid and allows for plate movement.

Front

Why is the asthenosphere considered crucial for plate tectonics?

Back

Its semi-solid nature allows tectonic plates to move over it.

Front

What are tectonic plates?

Back

Tectonic plates are large sections of the Earth's lithosphere that move and interact at their boundaries.