Continental Drift + Seafloor Spreading

Eventually the ocean floor plunges into deep underwater canyons we call ____________

What is the name of the underwater mountain ranges that scientists like Hess studied?

As the older oceanic crust cools, it becomes what?

As a continent moves towards the poles, it's climate _____________

Which of the following is NOT evidence of sea floor spreading?

In the mid-1900's, scientists mapped mid-ocean ridges using what device?

A deep-ocean trench is an underwater ____________

Older rock moves ________ from either side of a mid-ocean ridge

Alfred Wegener's theory that the continents slowly moved over Earth's surface is known as what?

The process by which the ocean floor sinks beneath a deep ocean trench is called ___________

Mid-Ocean Ridges continually add new material to the ocean floor in a process called what?

Where does sea-floor spreading occur?

Which was NOT a type of evidence that Wegener used to support his theory?

What is any trace of an ancient organism that has been preserved in rock?

Fill In: Alfred Wegener noticed that certain ______ ranges in Europe and North America match up

Where does subduction occur?

What did Wegener name the landmass that was made up of all continents joined together?

Which process changes the size and shape of the ocean?

True or False: The mid-ocean ridges form the longest mountain ranges on Earth.

Wegener's theory was rejected because he could not identify what?

"Pillow Lava" or rocks shaped like pillows form only when molten material hardens __________