Inside of Earth

How have scientists been able to study Earth's mantle?

• In some places, Earth's crust thins enough to see mantle.

• Earth's surface heat warms the crust turning it into mantle.

• Cooling crust material becomes mantle over time.

• In some places, mantle rock pushes to Earth's surface.

Which layer of the earth is rock made mostly of iron?

• Lithosphere
• Core
• Asthenosphere
• Mantle

What is the rigid layer of the Earth's surface made up of the  crust and upper mantle called?

• asthenosphere
• lithosphere
• mesosphere
• continental crust

The part of Earth where convection currents occur is the...

• Inner core
• Lithosphere
• Outer Core
• Asthenosphere

Is the outer core a liquid or solid?

• liquid
• solid

Temperature _____________________ as you go deeper into the earth.

• increases
• decreases
• goes up and down depending on the layer
• stays the same

A dense ball of solid iron and nickel.

• crust
• inner core
• mantle 
• outer core

The deeper you go into Earth, the density...

• increases
• decreases

What causes convection currents?

• The rising of cold material and falling of hot material
• The rising of hot material and falling of cold material 

Material that is LESS dense will...

• Sink 
• Float 
• Never move
• Turns into rock