Tectonic plates - Grade 10

Tectonic plates

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Done by: Mr. Milos Vidosavljevic

Geography Teacher

SAIS - UAQ - UAE

February 2022

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​Lesson objectives:

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''I can"

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Identify different types of Tectonic plate boundaries

Identify effects of Tectonic plate boundaries ​

Open Ended

Do you know anything about Tectonic plates?

​About

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Forces deep inside the Earth are constantly reshaping its surface.

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Plate Tectonics is a​ process involving huge blocks of Earth's crust and upper mantle that are called Tectonic plates to move in different directions. Tectonic plates include continents and parts of continents along with parts of the Ocean floor.

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Earth's Tectonic plates lie ​upon a layer of hot mantle rock which flows like melted plastic. Plates may move atop the mantle a few centimeter per year.

A ​Convergent plate boundaries

Effects

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The impact of the colliding plates can cause the edges of one or both plates to buckle up into a mountain ranges or one of the plates may bend down into a deep seafloor trench. A chain of volcanoes often forms parallel to convergent plate boundaries and powerful earthquakes are common along these boundaries. The Pacific Ring of Fire is an example of a convergent plate boundary.

​A Convergent plate boundary

​A Divergent plate boundary

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A divergent boundary occurs when two tectonic plates move away from each other. Along these boundaries, earthquakes are common and magma (molten rock) rises from the Earth’s mantle to the surface, solidifying to create new oceanic crust. The Mid-Atlantic Ridge is an example of divergent plate boundaries.

​A Divergent plate boundary

​A Transform plate boundary

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Two plates sliding past each other forms a transform plate boundary.​ One of the most famous transform plate boundaries occurs at the San Andreas fault zone, which extends underwater. Natural or human-made structures that cross a transform boundary are offset—split into pieces and carried in opposite directions. Earthquakes are common along these faults.

​A Transform plate boundary

Draw

Draw the convergent and divergent Tectonic plate boundary

​Alfred Wegener

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Alfred Lothar Wegener was a German climatologist, geologist, geophysicist, meteorologist, and polar researcher known for his Theory of the Continental Drift.

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​Theory of the Continental drift

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Continental drift describes one of the earliest ways geologists thought continents moved over time.

In the early 20th century, Wegener published a paper explaining his theory that the continental landmasses were “drifting” across the Earth, sometimes plowing through oceans and into each other.

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Multiple Choice

Oceanic crust is.....

• Younger and less dense than continental crust
• Thinner, younger, and more dense than continental crust
• older, thicker, and less dense than continental crust
• Bigger and younger than continental crust

Multiple Choice

What was the name given to all the continents when they were joined as one super continent?

• Supreme Continent
• Eurasia
• Plate tectonics
• Pangea

Multiple Choice

Which is older oceanic or continental crust?

• Oceanic
• Continental

Multiple Choice

Earth's crust is broken up into several large rocky pieces called ...

• plates
• faults
• fossils
• puzzle pieces

Multiple Choice

This type of boundary occurs when tectonic plate move together.

• covergent

• divergent

• transform

• none of the above

Multiple Choice

This is the type of boundary that occurs when tectonic plates move apart.

• convergent

• divergent

• transform

• none of the above

Multiple Choice

This type of boundary occurs when tectonic plates slide past one another.

• convergent

• divergent

• transform

• none of the above

Multiple Choice

Which of the following is found mainly around transform boundaries?

• mountains

• earthquakes

• volcanoes

• rift valley

Multiple Choice

When two continental crusts slam into each other which of the following is the prominent feature formed?

• mountains

• earthquakes

• volcanoes

• rift valley

Open Ended

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