Wegener's Hypothesis

What was Wegener's hypothesis called?

• seafloor spreading

• plate tectonics

• continental drift

• slab pull

What was Pangaea?

• an ancient supercontinent

• a prehistoric fossil

• a widespread glacier

• a rock formation

Which was NOT a type of evidence used to support the hypothesis of continental drift?

• fossil evidence

• rock evidence

• chemical evidence

• climatic evidence

Why was Wegener's hypothesis rejected by scientists of his time?

• He had no evidence that continents drifted.

• He could not explain how continents drifted.

• He did not know when the continents began to drift apart.

• He did not know what Pangaea may have looked like.

How deep is the deepest hole that we have ever drilled into the Earth?

• 12 km

• 20 km

• 5 km

• 30 km

How do we know about the interior of the Earth?

• By digging

• By studying seismic waves

• By using satellites

• By theoretical calculations

What are the three major layers of the Earth?

• Crust, mantle, core

• Crust, sediment, core

• Mantle, outer core, inner core

• Crust, lava, mantle

What happens to the temperature, pressure, and density as you go deeper into the Earth?

• They decrease

• They stay the same

• They fluctuate

• They gradually increase

What is the average density of the continental crust?

• 2.7 g/cm³

• 3 g/cm³

• 4 g/cm³

• 1.5 g/cm³

How thick is the oceanic crust?

• 7 km

• 8-75 km

• 10 km

• 5 km