In sea-floor spreading, molten material rises from the mantle and erupts

What technology did scientists use to map the mid-ocean ridge?

When continental plates pull apart at a divergent boundary on land, a _________ forms.

Along a __________________ boundary, two plates slip past each other, moving in opposite directions.

The theory of ______________________ was that all continents were once joined as a single supercontinent and have since drifted apart.

The geological theory that states pieces of Earth's lithosphere are in constant, slow motion is the theory of ______.

This forms between 2 oceanic plates that are moving apart.

This forms when 2 plates of different densities collide and one plate goes under the other plate.

When 2 oceanic plates collide....

When 2 continental plates collide.....

When an oceanic plate collides with a continental plate.....

According to Wegener's hypothesis of continent drift....

The name of the supercontinent that existed millions of years ago is....

When subduction occurs faster than oceanic crust can be created, an ocean will

__________________ is when one plate goes under another plate and melts in the mantle

The earth's crust that is located under the ocean is called....

The Earth's crust that is located on dry land, where we live, is called....

Select 2 examples of continents that have drifted apart from each other when joined as the supercontinent, Pangaea.

Select 2 answers that are evidence to support the hypothesis that Africa and South America were once joined.

_______________________ form the longest mountain ranges on Earth.

Oceanic crust near the mid-ocean ridge is _____________ than oceanic crust farther away from the ridge.

The lithosphere is broken into sections called _____________, which float on top of the asthenosphere layer.

_____________ is more dense that new oceanic crust because it is cooler.