Earth's Layers Review

What are the two main ways Earth's layers can be classified?

• By color and size

• By chemical composition and mechanical properties

• By age and temperature

• By density and volume

Which layers of Earth are classified based on chemical composition?

• Lithosphere, asthenosphere, and mesosphere

• Core, mantle, and crust

• Outer core and inner core

• Atmosphere and hydrosphere

What is the state of matter of the Earth's inner core?

• Liquid

• Gas

• Plasma

• Solid

What is another source of heat in the Earth's inner core besides radioactive decay and residual heat?

• Heat from the sun

• Heat from volcanic activity

• Heat emitted by the solidification of the outer core

• Heat from ocean currents

What is the approximate thickness of Earth's outer core?

• 1,367 miles (2,200 km)

• 1,400 miles (2,300 km)

• 1,500 miles (2,400 km)

• 1,600 miles (2,500 km)

Which layer is located between the outer core and the asthenosphere?

• Lower mantle

• Upper mantle

• Crust

• Inner core

Which layer contains the asthenosphere?

• Upper mantle

• Lower mantle

• Outer core

• Inner core

What is the significance of the mantle's composition?

• It affects Earth's magnetic field.

• It influences volcanic activity.

• It determines the color of the crust.

• It controls the weather patterns.

Tags

NGSS.MS-ESS2-1

What keeps the lower mantle solid despite high temperatures?

• Low pressure

• Immense pressure

• Low temperature

• High density

What is the temperature of the asthenosphere?

• 1,000 degrees F (538 degrees C)

• 2,732 degrees F (1,500 degrees C)

• 3,500 degrees F (1,927 degrees C)

• 4,000 degrees F (2,204 degrees C)

Tags

NGSS.HS-ESS2-3