What evidence did Wegener have to support his theory of continental drift?

matching fossils on different continents, landform shapes that align like puzzle pieces and tropical fossils found in cold climates

sonar readings of undersea mountains and proof of convection currents in the asthenosphere

mass extinctions, rock layers and cave drawings

eye witness reports of the continents moving from one location to another

Which of the following provides the best explanation as to why convection currents in the mantle cause tectonic plate movement?

Warm, less dense molten material rises while cool, more dense material sinks creating convection currents which cause the tectonic plates to move.

Cool, less dense molten material rises while warm, more dense material sinks creating convection currents which cause the tectonic plates to move.

Warm, more dense molten material rises while cool, less dense material sinks creating convection currents which cause the tectonic plates to move.

Cool, more dense molten material rises while warm, less dense material sinks creating convection currents which cause the tectonic plates to move.

Which of the following statements is TRUE about Earth’s lithospheric plates?

New material is being added to some of the edges, and the same amount of material is being crumpled upward or recycled back into the earth’s interior.

Material is being removed from some of the edges, and no new material is being added.

New material is being added to some of the edges, and no material is being removed.

New material is being added to some of the edges, and the same amount of material is being broken into pieces and carried away.

Magma pushes up from the mantle in the middle of the Atlantic Ocean. As a result, the Atlantic Ocean is growing by several centimeters each year. How else has this magma affected the Atlantic Ocean?

It has created a long, large mountain range below the ocean's surface.

It has produced a flat, smooth ocean floor as the continents separate.

It has produced volcanoes along the edges of the separated continents.

It has made the Atlantic waters much warmer than the Pacific Ocean waters.

is more dense than continental crust.

is less dense than continental crust.

. has the same density as continental crust.

Most geologists think that the movement of Earth’s plates is caused by:

convection currents in the asthenosphere.

subduction from the ocean floor.

rth’s magnetic field created by the Earth’s core.

What is the correct order, starting from the surface, of Earth’s layers?

crust, mantle, outer core, inner core

crust, outer core, inner core, mantle

crust, mantle, inner core, outer core

crust, inner core, outer core, mantle

The inner core of Earth is SOLID iron and nickel. Iron and nickel will MELT at temperatures around 1,500°C. The average temperature of the inner core is about 5,000°C. Why then, does the inner core not melt and become a liquid?

the extreme pressure at the center of the Earth keeps the core solid

the combination of iron and nickel will remain solid.

the outer core cools the inner core keeping the inner core solid

If we compare the density and temperature of the Earth's mantle to the core, what differences can we expect as we move downward into the Earth?

Both the temperature and density increase.

Both the temperature and density decrease.

The temperature decreases and the density increases.

The temperature increases and the density decreases.

Scientists’ knowledge of the Earth’s interior has come primarily from:

studying seismic waves generated by earthquakes.

using a system of satellites called the global positioning system

studying the pattern of fossils on different continents.

studying magnetic reversals in the oceanic crust.

When two plates converge, one plate is usually forced to slide under the other. Oceanic plates are more dense than continental plates. If an oceanic plate collides with a continental plate, what will be the likely result?

The oceanic plate will be pushed under the continental plate, creating an oceanic trench.

The continental plate will be pusehd under the oceanic plate, creating an oceanic trench.

The continental plate will be pushed under the oceanic plate, creating a mid-ocean ridge.

The oceanic plate will be pushed under the continental plate, creating a mid-ocean ridge.

Which statement best describes the composition of the ancient supercontinent, Pangaea?

Pangaea contained all of Earth’s continental crust.

Pangaea contained all of Earth’s crust.

Pangaea contained all of Earth’s tectonic plates.

Pangaea contained all of Earth’s oceanic crust.

Which of the following describes the layer directly beneath Earth’s lithospheric plates?

It moves very slowly, and it moves in different directions in different places.

It moves very slowly, and it moves in only one direction around the Earth.

It moves very rapidly, and it moves in different directions in different places.

Which of the following statements is true? Layer Density Thickness Continental Crust 2.7 g/cm3 30-100km Oceanic Crust 3.0 g/cm3 5 km Mantle 3.4-5.6 g/cm3 2,900 km Core 9.9-13.0 g/cm3 3,430 km

The core is Earth's thickets and densest layer.

The mantle is Earth's thickest and densest layer.

Continental crust is Earth's thinnest and densest layer.

Oceanic crust is Earth's thinnest and least dense layer.

Fossils of a particular animal species have been found in both southern Africa and South America but nowhere else. Which of the following is MOST LIKELY the reason why?

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

The climate changed and became much colder.

The fossils evolved into different organisms.

In the future, Africa and South America will be part of the same continent.

What conclusion can be drawn from the Theory of Plate Tectonics?

Earth's geography is continually changing.

Earth is continually losing heat

The ocean basins are continually enlarging.

Using the map above, why is it important to know that the same fossils are found in Africa, India, and Antarctica?

The fossils prove that the continents were all once joined together and have drifted apart over hundreds of thousands of years.

The fossils prove that the same species of animals can be found living in different continents on Earth today.

The fossils prove that the continents will be joined together in the future and create one large continent.

The fossils do not prove anything so it is not worth the time to dig them up from the ground.

Using the map above, which result below supports that climate change over time is evidence to support the Theory of Continental Drift?

Antarctica drifted farther from the equator causing its climate to cool.

Pangaea broke apart causing an ice age.

North America drifted farther from the equator causing its climate to heat up.

Over time, the equator gradually became warmer and the poles became colder.

You and a friend are hiking in the mountains. You stop to make a campground for the night. As you and your friend are digging a small hole to safely build a firepit, you discover many seashells. What can you conclude about the seashells found on the side of the mountain?

The area was once covered with water.

The area was never located under water.

The area was once located in a dry, cold area.

The animals that used these shells once lived on land.

Plate Tectonics Review

Authored by Science Girl 101

Other, Other Sciences

6th - 8th Grade

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

Compared to the Atlantic Ocean, the Pacific Ocean is

staying the same size.

decreasing in size.

increasing in size.

none of the above.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What type of boundary is the diagram showing and what is likely to occur?

convergent boundary forming earthquakes

convergent boundary forming volcanoes

transform boundary forming volcanoes

transform boundary forming earthquakes

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What forms along subduction zones?

glaciers

canyons

mid-ocean ridges

deep ocean trenches

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Why are volcanoes sometimes formed at convergent boundaries?

As oceanic and continental crust both sink into the mantle, rising magma forms volcanoes.

As oceanic crust sinks and melts at the boundary, the magma rises up through a weak spot in Earth’s crust.

As oceanic and continental crusts collide, the impact melts the continental crust causing volcanoes to form.

As continental crust sinks below oceanic crust, lava is created and forms volcanoes.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Where does volcanic and earthquake activity occur?

Along plate boundaries

Near the MOR

At a rift valley

Only transform boundaries

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the diagram showing?

convergent boundary

divergent boundary

mountain boundary

transform boundary

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A collision between two pieces of continental crust at a converging boundary produces a:

rift valley.

deep ocean trench.

mountain range.

mid-ocean ridge.

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Plate Tectonics Review

Compared to the Atlantic Ocean, the Pacific Ocean is

What type of boundary is the diagram showing and what is likely to occur?

What forms along subduction zones?

Why are volcanoes sometimes formed at convergent boundaries?

Where does volcanic and earthquake activity occur?

What is the diagram showing?

A collision between two pieces of continental crust at a converging boundary produces a:

What landform would you expect to find at the boundary of the Nazca Plate and the South American Plate?

What evidence did Wegener have to support his theory of continental drift?

The process by which the ocean floor sinks through a deep ocean trench and back into the mantle is known as:

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