Continental Drift/ Seafloor Spreading

What do scientists believe is responsible for the movement of tectonic plates?

• Thermal energy that radiates from the sun

• Friction between the lithosphere and asthenosphere

• Convection currents within the asthenosphere

• Earth’s rotation

Which of the following is a piece of evidence that support’s the Theory of Continental Drift?

• Coal deposits in North America match up with coal deposits across Europe.

• The east coast of South America complements the west coast of Africa.

• Fossils of the same plants and animals living at the same time were found in South America, Africa, India and Australia.

• All of the above

How long did it take Pangaea to break-up and for the continents to move to their current positions today?

• Hundreds of years

• Nearly a million years

• Hundreds of millions of years

Seafloor spreading occurs at:

• a convergent boundary

• a divergent boundary

• a transform boundary

• None of the above.

What is convection?

• Transfer of heat by movement of the fluid

• Transfer of heat across a vacuum

• Transfer of heat between objects that directly touch each other

• Transfer of heat by electromagnetic waves

What does the Continental Drift Theory explain?

• How Earth was formed

• How continental crust is formed

• How water moves continents across the globe

• The movement of tectonic plates and thus, continents

Matching rocks and minerals on separate continents is a form of:

• Landform evidence

• Geologic evidence

• Fossil evidence

• None of the above – this is not a form of evidence

These three animals below represent what type of evidence that the continents actually moved.

• Zoological evidence

• Glacial evidence

• Evidence of climate change

• Fossil evidence

Evidence of sea-floor spreading supports the hypothesis of continental drift by providing _____.

• a mechanism by which continents can move

• samples from Earth's core

• the three types of plate boundaries

• a good example of mountain building

 Earth’s lithosphere is composed of

• the crust only.

• the mantle only.

• the mantle and the upper portion of the outer core.

• the crust and the upper portion of the mantle.