Continental Drift and Seafloor Spreading

Multiple Choice

What did Alfred Wegener notice?

• That all continents were different

• All continents fit together like a puzzle

• all continents were like broken glass

• all continents were complete separate from each other

Multiple Choice

What did Wegener call this giant land mass?

• Earth

• Aliens

• PANGAEA

• continents

Multiple Select

What were his two reasons for this theory?

• rock layers on continents that would fit together

• separate plants on all continents

• separate rock layers on all continents

• warm weather plants on Antarctica

Multiple Choice

Wegener's theory was _______________ until after his death.

• rejected

• accepted

• world reknown

• highly praised.

Multiple Choice

What did Harry Hess discover?

• continents stayed put

• the seafloor did not move

• seafloor spreading

• continents are mobile and move with the winds

Multiple Choice

What is seafloor spreading?

• when continents move towards each other

• when new seafloor is made at trenches where magma erupts.

• when seafloor is lost in the trenches

• when new seafloor is made at mid-ocean ridges where magma erupts and cools.

Multiple Choice

How was the seafloor mapped?

• sound waves

• radiation

• diving to the bottom of the ocean and taking pictures

• echolocation

Multiple Choice

True or false: There is not evidence for seafloor spreading.

• True

• False

Multiple Choice

Where is the newest rock formations found?

• towards the surface of the ocean

• further away from the mid-ocean ridge

• closer to the mid ocean ridge

• bottom of the deepest trenches.

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