How is Earth Changing? Test Prep Quiz

Name the four layers of the Earth in order from the outside to the center of the Earth.

• Crust, Outer Core, Mantle, Inner Core

• Crust, Mantle, Outer Core, Inner Core

• Mantle, Crust, Inner Core, Outer Core

• Inner Core, Outer Core, Mantle, Crust

What causes the mantle to 'flow'?

• Rotation of the Earth

• Magnetic fields

• Convection currents

• Gravitational pull from the moon

What are the two main metals that make up the outer and inner core?

• Aluminum and Silver

• Nickel and Iron

• Copper and Zinc

• Gold and Platinum

Describe in your own words how the Earth's layers were formed.

• Through the cooling and differentiation of materials based on density

• By the accumulation of space dust and gas

• Through the solidification of a single mass of molten rock

• By the impact of large celestial bodies

How thick is the Earth's crust under the oceans?

• 12-15 miles

• 20-25 miles

• 3-5 miles

• 8-10 miles

What is the temperature at the deepest parts of the crust?

• 500 degrees Celsius

• 750 degrees Celsius

• 1000 degrees Celsius

• 870 degrees Celsius

What type of rock is the oceanic crust mostly composed of?

• Granite

• Slate

• Basalt

• Limestone

What layer of the Earth is directly under the crust?

• Asthenosphere

• Mantle

• Outer Core

• Inner Core

What is the approximate temperature near the bottom of the mantle?

• 7000 degrees Fahrenheit

• 6000 degrees Fahrenheit

• 5000 degrees Fahrenheit

• 4000 degrees Fahrenheit

What phenomenon allows the crust to 'get a free ride' with the mantle's movement?

• Tidal forces

• Convection currents

• Centrifugal force

• Magnetic repulsion