Show:
Continental Drift
Seafloor Spreading
Plate Tectonics
True or False
Random
100

Alfred Wegener

What is the name of the scientist who came up with the theory of Continental Drift?

100

Hot, less dense magma below earth's crust rises to the surface at the mid ocean ridges, flows sideways, carrying the seafloor away from the ridge in both directions.

What is the theory of Seafloor Spreading?

100
The names of the 3 types of plate boundaries.
What is divergent, convergent, and transform boundaries?
100

Albert Einstein stated that there was a geographic change in the seafloor and the ocean floor was spreading to make new forms___________.

False . Harry Hess

100
The cycle of heating, cooling, and sinking thought to be the force moving the tectonic plates.
What are convection currents?
200
The name of the "supercontinent" that existed 200 million years ago
What is Pangaea?
200
The name of the scientist who came up with the theory of Seafloor Spreading.
Who is Harry Hess?
200

When a dense, oceanic plate converges with a less dense plate, the oceanic plate sinks under the less dense plate.

What is a Subduction Zone?

200

Alfred Wegener provided evidence from landforms, fossils, and climate in support of his theory of the shrinking Earth.

False, Continental drift

200
The type of boundary where mid-ocean ridges and rift valleys are found.
What is a divergent plate boundary?
300
The theory that all continents were once connected as one large landmass that moved to their present location over 200 million years.
What is the theory of Continental Drift?
300

The process of _________________________ continually adds new crust to the ocean floor along both sides of the mid-ocean ridge.

sea-floor spreading

300
The type of plate boundary found at a Subduction Zone.
What is a convergent plate boundary?
300

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

False, Transform boundary

300
The type of plate boundary where mountain ranges form.
What is a convergent plate boundary?
400

Why did most people not accept Alfred Wegener's theory of Continental Drift?

No one could explain how or why the continents moved.

400
Seafloor spreading happens at this type of plate boundary.
What is a divergent boundary?
400
When plates slide past each other in opposite directions, or move in the same direction at different speeds.
What is a transform boundary?
400

The place where two plates move away from each other forming new ocean floor is the transform boundary.

False. Divergent boundaries

400

the name of the supercontinent that existed millions of years ago

What is Pangaea?

500
These are the 4 pieces of evidence supporting Wegener's theory of Continental Drift.
What is the puzzle-like fit of continents, fossil clues, climate clues, and rock clues?
500
This theory helped prove Alfred Wegener's theory.
What is the theory of Seafloor Spreading?
500

The earth's crust and part of upper mantle are broken into large sections called plates that move on the plastic-like layer of the mantle.

What is the theory of Plate Tectonics?

500

Along the Mid-Atlantic ridge, the North American plate and the Eurasian plate are moving apart at a very slow rate

True

500

A rift valley forms at a

What is a divergent plate boundary