Continental Drift, Sea-floor Spreading, & Plate Boundaries

Front

Predict what the Earth will look like in 3 million years as sea-floor spreading continues: The Rocky Mountains will be taller than they are now., The continents will drift back to their original Pangaea positions., The oceans that produce more rock than it subducts will decrease in size., The oceans that have a mid-ocean ridge but fewer deep ocean trenches will continue to grow.

Back

The oceans that have a mid-ocean ridge but fewer deep ocean trenches will continue to grow.

Front

How do Mid-Ocean Ridges support both the idea of continental drift and the theory of plate tectonics?

Back

New crust forms at mid-ocean ridges.

Front

Compare the process that occurs at a mid-ocean ridge to the process that occurs at a deep ocean trench?

Back

New rock is being created at a mid-ocean ridge and old rock is being subducted at a deep ocean trench.

Front

Which piece of evidence did Wegener NOT use to support his theory of continental drift? Options: Climate, Sea-floor spreading, Continents’ shape, Plant and animal fossils

Back

Sea-floor spreading

Front

Who proposed the theory of Sea-Floor Spreading?

Back

Harry Hess

Front

What is the name for the process where new ocean floor is constantly being created AND recycled?

Back

Sea floor spreading

Front

Which of the following did Alfred Wegener propose? Options:   There is a mid-ocean ridge creating new ocean floor., Sea-floor spreading is causing the continents to drift., Convection currents are causing our continents to drift., All continents were once joined together as one and have since drifted apart.

Back

All continents were once joined together as one and have since drifted apart.

Front

Fossils of a dinosaur have been found in both southern Africa and South America but nowhere else. What does this mean?

Back

In the past, Africa and South America were part of the same continent.

Front

Sea-floor spreading states that new ocean crust is being formed constantly. Which of the following is also true? The oceans are constantly getting bigger., The amount of land on earth is constantly increasing., The amount of land on earth remains the same due to subduction., When the size of the crust reaches a certain amount, sea-floor spreading will stop.

Back

The amount of land on earth remains the same due to subduction.

Front

Which of the following objects best represents the movement that occurs during sea-floor spreading? Elevator, Conveyor belt, Rollercoaster, Hot air balloon

Back

Conveyor belt