Continental Drift & Seafloor Spreading

The name given to the super-continent when all the continents were connected.

• Pangaea
• Asia
• Africanta
• Subduction

The layer beneath the lithosphere, where plates "float" and move on this layer. Also where convection currents occur.

• asthenosphere
• inner core
• mantle
• outer core

The outermost layer of Earth where they are divided into tectonic plates, consists of crust and top of the mantle.

• asthenosphere
• lithosphere
• inner core
• outer core

A place in the seafloor where the subducted plate moves back into the mantle and recycled.

• deep ocean trench
• mid-ocean ridge
• lithosphere
• asthenosphere

The longest mountain chain in world; where new ocean floor is produced.

• mid-ocean ridge
• deep ocean trench
• pangaea
• subduction

What the scientists used in the mid-1900s to map the mid-ocean ridge

• sonar
• lights
• imagination
• bats

The movement of a fluid, caused by differences in temperature, that transfers heat energy from one part of the fluid to another.  Occurs in the asthenosphere.

• convection currents
• subduction
• mid-ocean ridge
• pange

There are 3 evidences for Wegener's Theory of Continental Drift.  Which one is NOT one of those evidences?

• fossil evidence
• continents fit together
• landforms match up
• magnetic striping

Why was Wegener's theory not accepted?

• He couldn't prove it.
• Harry Hess was more popular.
• Wegener was not a real scientist.
• The evidences didn't match the theory.

Which answer is NOT an evidence of seafloor spreading?

• magnetic striping
• drilling samples
• molten material
• fossils