CFU 5.2

Seafloor spreading occurs at a ________________ as new crust is created.

• Mid-Ocean Ridge
• Rift Valley
• Trench
• Mountain

What happens to the total amount of crust on the Earth?

• The amount of crust is always increasing
• The amount of crust is always decreasing
• The amount of crust stays the same

What does A represent in the diagram?

• Magma
• Mid-Ocean Ridge
• Convection
• Subduction zone

What does B represent in the diagram?

• Magma
• Mid-Ocean Ridge
• Convection
• Subduction zone

What does C represent in the diagram?

• Magma
• Mid-Ocean Ridge
• Convection
• Subduction zone

What does D represent in the diagram?

• Magma
• Mid-Ocean Ridge
• Convection
• Subduction zone