Continental Drift - Plate Tectonics

Continental Drift

1

This is the name of the proposed "supercontinent" where all the earth's continents were once joined together.

What is Pangaea?

2

This is the meteorologist who first proposed the Theory of Continental Drift

Who is Alfred Wegener?

3

This is how many years ago earth's "supercontinent" began to split apart.

When was 200 million years ago?

4

These are the evidences that were initially used to support the Theory of Continental Drift. (2)

What are the fit of the continents, fossil correlation, rock types and structures, ancient climates, coal deposits?

5

He suggested that the continental shelves would fit better because of the absence of erosion beneath the oceans

Who is Alexander Du Toit?

Seafloor Spreading/Hotspot

1

Seafloor Spreading occurs at what type of plate boundary?

What is a divergent boundary?

2

These features form as new crust that rises to the surface during seafloor spreading

What are mid-ocean ridges?

3

This ocean is currently growing in size due to seafloor spreading.

What is the Atlantic Ocean?

4

The term that refers to the jet of hot rising material from deep within the mantle.

What is mantle plume?

5

The reasons given by Wegener why the plates move

What is Earth's rotation and moon's gravitational force

Earth's Plates/Pangaea

1

This is the underlaying (plastic-rock) flowing layer which allows the earth's plates to move.

What is the Asthenosphere?

2

This is the rigid upper layer of the earth which inlcudes the earth's crust and upper most mantle.

What is the lithosphere?

3

This is the total number of plates known on earth.

What is 15?

4

This geologic feature formed when the Philippine plate and Pacific plate collided and found in the western Pacific Ocean

What is Mariana Trench?

5

The period where the "supercontinent" started to divide into Laurasia and Gondwanaland.

When was Triassic Period?

Plate Boundaries

1

This type of plate boundary involves two plates moving apart from one another.

What is a divergent boundary?

2

This type of plate boundary involves two plates moving toward each other.

What is a convergent boundary?

3

This type of plate boundary involves one plate sliding past another plate.

What is a transform boundary?

4

This is the term for one plate being forced underneath another plate.

What is Subduction?

5

This is the term for the fracture created when one plate suddenly slides past another plate.

What is a fault?

Effects of Plate Tectonics

1

These features are produced on earth when two continents collide.

What are mountains?

2

These features are produced on the coasts of continents where oceanic crust moves underneath the continent.

What are volcanoes or volcanic arcs?

3

These natural disasters occur when a sudden movement occurs along transform boundaries.

What are earthquakes?

4

This is the name of fault found in California where several major earthquakes have occured.

What is the San Andreas Fault?

5

These two features form in the ocean when one oceanic plate is forced below another oceanic plate

What are trenches and volcanic islands?