Plate motion LEAP Review

Plate Motion LEAP review

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is the supercontinent proposed by Alfred Wegener that began to break apart about 175 million years ago

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The ring of

is a chain of volcanoes that surround the Pacific Plate

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boundaries is where two plates ​

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next to each other. At this boundary, we get a lot of ​

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.

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Convection currents is what makes the tectonic plates ​

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Multiple Choice

What are tectonic plates?

• large, irregularly shaped slabs of solid rock (both continental and oceanic crust) that make up Earth's lithosphere and float on the mantle,

• large, irregularly shaped slabs of solid rock (both continental and oceanic crust) that make up Earth's lithosphere and float on the ocean.

• The continents

Multiple Choice

What is continental drift?

• The idea that the earth’s continents moved apart from one large singe continent.

• When plates are moving on Earth

• When Pangea broke apart

• Subduction zones

Multiple Choice

What layer of the earth is the biggest and made up of liquid rock?

• core

• mantle

• inner core

• outer core

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are remains of ancient living things.

Multiple Choice

What is sea floor spreading?

• The sea floor spreads apart along both sides of a mid-ocean ridge as new crust is added.

• When the crust subducts into the mantle

• When crust is destroyed at a boundary

Multiple Select

What was evidence that Wegener used to prove that the continents were moving?

• Fossils

• glacial evidence

• continents fitting like puzzle pieces

• DNA evidence

Match

Match the following

• Convergent boundaries

• Divergent boundaries

• Transform boundaries

• Mid- oceanic ridges

• Subduction zones

Coming together

Separating

Slide next to each other

Create new crust

Destroy crust

• Coming together

• Separating

• Slide next to each other

• Create new crust

• Destroy crust

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The

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is solid metal while the ​ ​

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is liquid metal.

Multiple Choice

What is a scientific theory?

• Scientific theory – a well tested concept that explains a wide range of observations. ​

• a scientific law

• something that is NOT supported by evidence

Reorder

List the layers of the earth in order from the surface to the center

• crust

• lithosphere

• asthenosphere

• mantle

• core

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Multiple Choice

What is plate tectonics?

• The continents drifting apart

• The theory that Earth’s lithosphere is divided into several plates that glide over the plastic-like and less rigid asthenosphere.

• When the continents float around the earth on the oceans

Multiple Choice

When the fluid at the top begins to cool, it becomes more dense and moves to the bottom causing the convection current, or the flow that transfers heat. ​ What does this explain?

• Radiation

• Conduction

• Convection currents

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is the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.

Multiple Choice

What is the lithosphere?

• The lithosphere  - composed of both the crust and the portion of the upper mantle that behaves as a brittle, rigid solid.

• the part of the mantle that moves

• the outer core

• The outer crust

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The asthenosphere is where the convection

are.

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Both the inner and outer core are made of nickel and

.

Multiple Choice

Rift valleys happen on land in this type of plate boundary.

• convergent

• transverse

• divergent

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crust is thicker than ​

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crust. Both types of ​

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is the outermost layers of the earth.

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The thinnest layer of our earth is the

.

Multiple Choice

What type of crust is the thinnest?

• oceanic

• continental

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boundaries create new crust on earth.

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boundaries destroy crust at trenches and subduction zones.

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boundaries separate at ​

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or​ at ​

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(if on land). This type of boundary​

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new crust.

Multiple Choice

The edges of the tectonic plates meet at lines called

• plate boundaries
• geological fractures
• fault lines
• tectonic seams

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There are

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different type of plate boundaries. ​

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boundaries separate​

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boundaries come together, and ​

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boundaries slip side by side.