6.3 Checkpoint #1

Front

What is the least dense mechanical layer of the Earth?

Back

Lithosphere

Front

Which mechanical layer contains the crust and upper mantle?

Back

Lithosphere

Front

List the mechanical layers of the Earth in order from innermost to outermost.

Back

Inner core, outer core, mesosphere, asthenosphere, lithosphere

Front

What two metals primarily compose Earth's core?

Back

Iron and Nickel

Front

What is the thinnest compositional layer of the Earth?

Back

Crust

Front

Define lithosphere.

Back

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

Front

What is the asthenosphere?

Back

A semi-fluid layer beneath the lithosphere that allows for the movement of tectonic plates.

Front

What is the composition of the outer core?

Back

Liquid iron and nickel.

Front

What is the primary characteristic of the inner core?

Back

It is solid and composed mainly of iron and nickel.

Front

Explain the term 'mesosphere' in the context of Earth's layers.

Back

The layer of the Earth's mantle located below the asthenosphere, characterized by increased rigidity.