Earth's Layers Graded Flashcard

Front

What are the main layers of the Earth?

Back

The main layers of the Earth are the crust, mantle, outer core, and inner core.

Front

What is the thickness of the outer core?

Back

The outer core is approximately 2250 km thick.

Front

What is the temperature of the outer core?

Back

The temperature of the outer core is about 8000 degrees Fahrenheit.

Front

What is the composition of the outer core?

Back

The outer core is made of liquid metals, primarily iron and nickel.

Front

What layer of the Earth is closest to the atmosphere?

Back

The crust is the layer closest to the atmosphere.

Front

What elements are primarily found in the crust?

Back

The crust contains oxygen, silicon, and aluminum.

Front

What do geologists call the crust and uppermost mantle?

Back

Geologists refer to the crust and uppermost mantle as the lithosphere.

Front

What is the thickness of the inner core?

Back

The inner core is approximately 1200 km thick.

Front

What is the temperature of the inner core?

Back

The temperature of the inner core is about 9000 degrees Fahrenheit.

Front

What is the pressure like in the inner core?

Back

The inner core has the highest pressure of all Earth's layers.