Unit 6 Review

The layers of the Earth have different densities. According to the graph which layer is the least dense? most dense?

• The mantle is the least dense; the crust is the most dense

• The crust is the least dense; and the inner core is the most dense

• The inner core is the least dense; and the crust is the most dense

Name the layers of the Earth from the center of the Earth to the surface.

• mantle, crust, inner core, outer core

• outer core, inner core, mantle, crust

• inner core, outer core, mantle, crust

• crust, mantle, outer core, inner core

The Earth's outer core is made primarily of what state of matter?

• Solid

• Liquid

• Gas

• Plasma

What is the main element found in the Earth's core?

• Oxygen

• Silicon

• Iron

• Carbon

Which layer of the Earth is the thickest?

• Crust

• Mantle

• Outer core

• Inner core

Which layer of the Earth is the hottest?

• Crust

• Mantle

• Outer core

• Inner core

Sedimentary rock can be transformed into a metamorphic rock by which process?

• Weathering and Erosion

• Melting

• Cooling

• Heat and Pressure

Melting rocks turn them into magma. What does it turn into after it cools?

• Metamorphic

• Sedimentary

• Igenous

• Sediments

Heat and pressure causes an igneous rock to change into a metamorphic rock. What changes that metamorphic rock into sediments?

• Weathering and Erosion

• Cooling

• Compaction

  Cementation

• Heat and Pressure

Lava that is still deep inside the earth is called ____________________________.

• lava
• magma
• volcano
• earthquake