ES 2.1 Earth as a System

Front

What are the Earth's 3 compositional zones in order from INNERMOST to OUTERMOST?

Back

core, mantle, crust

Front

What is the thickest inner layer of the Earth?

Back

mantle

Front

What is the estimated age of the Earth?

Back

4.6 billion years

Front

What is the structural zone of the Earth made of liquid metal that powers the Earth's magnetic field?

Back

outer core

Front

What shape is the Earth?

Back

oblate spheroid

Front

What is the outermost layer of the Earth called?

Back

crust

Front

What is the layer of the Earth located between the crust and the outer core?

Back

mantle

Front

What is the primary component of the Earth's core?

Back

iron and nickel

Front

What is the term for the solid outer layer of the Earth?

Back

lithosphere

Front

What is the semi-fluid layer beneath the lithosphere?

Back

asthenosphere