Plate Boundaries

Poll

How are you today?

• Happy

• Tired

• Sad

• Excited

• Grateful

Multiple Choice

Which of the earth's layers is broken into several large tectonic plates?

• Asthenosphere

• Lithosphere

• Crust

• Outer Core

Multiple Choice

The tectonic plates float on which semiliquid layer?

• Asthenosphere

• Mantle

• Inner Core

• Crust

Multiple Choice

What do you call the huge pieces of rocks that the outer layer of the Earth's crust is made up of?

• faults

• magma

• tectonic plates

• tsunamis

Multiple Choice

What causes the movement of tectonic plates?

• heated currents deep within Earth

• the formation of mountains over time

• tsunamis

• earthquakes

Multiple Choice

This refers to the idea that continents were once part of a single landmass that broke apart and

moved

• continental drift theory

• theory of plate tectonics

• transformation theory

• sea-floor spreading

Plate Boundaries

Open Ended

What do you want to learn in this topic?

​Objectives

• ​describe the different types of plate boundaries; and

• explain the different processes that occur along the plate boundaries.

Open Ended

According to the Continental Drift Theory, the Earth was once connected into one supercontinent. If the continents were connected before, how did they move? What made the Eath’s plates move?

​Plate Boundaries

• the edges where two plates meet​

• ​important because they are often associated with earthquakes and volcanoes

​Guide Questions

1. ​What are the different types of plate boundaries?

2. When does each type of plate boundary occur?

3. What is formed in each type of boundary? 

​Types of Plate Boundaries

​Convergent Boundary

• formed when two tectonic plates come towards each other

• results to the formation of notable landforms like mountains and volcanoes

• ​Indian Plate and the Eurasian Plate—forms towering mountain ranges, like the Himalayas, as Earth’s crust is crumpled and pushed upward.

​Continental-Continental Covergent Boundary

• ​two continental plates converge

• the older, denser plate​ is being forced deep into the planet underneat a younger, less dense tectonic plate

• ​when the plates converge they smash together and create mountains

​Oceanic-Oceanic Convergent Boundary

• ​two oceanic plates collide

• the younger oceanic plate slides above the older oceanic plate.

• The product of these collisions are volcanic island arcs and trenches.

• Fun fact! Some countries are products an oceanic-oceanic convergent boundary, one is Japan and even Philippines.

​Oceanic-Continental Convergent Boundary

• the denser oceanic plate is pushed under the less dense continental plate in the same manner as at an ocean-ocean boundary

• ​the magma produced adjacent to the subduction zone rises to the base of the continental crust and leads to partial melting of the crustal rock.

​Oceanic-Continental Convergent Boundary

• the resulting magma ascends through the crust, producing a mountain chain with many volcanoes

• as with an ocean-ocean boundary, the subducting crust can produce a deep trench running parallel to the coastline.

Divergent Boundary

• ​occur when two plates move apart

• it can happen in between both continental crust and oceanic crust

• a divergent plate boundary often forms a mountain chain known as a ridge

Divergent Boundary

• One example of a ridge is the Mid-Atlantic Ridge, an undersea chain of mountains that formed as two pairs of tectonic plates spread apart: the North American Plate and the Eurasian Plate in the north, and the South American Plate and the African Plate in the south.

Transform Boundary Boundary

• plates slide past each other, horizontally

• ​one of the examples for this is the San Andreas Fault which is responsible for the California's Earthquake.

​Life is a series of natural and spontaneous changes. Don’t resist them - that only creates sorrow. Let reality be reality. Let things flow naturally forward in whatever way they like.

​ —Lao Tzu

​

Predict my Future! Directions: Applying what you have learned about the types of plate boundaries, predict the type of landform that will be formed with the given plate tectonic activities.​

​

Multiple Choice

• Convergent Boundary

• Divergent Boundary

• Transform Boundary

Multiple Choice

• Convergent Boundary

• Divergent Boundary

• Transform Boundary

Multiple Choice

• Convergent Boundary

• Divergent Boundary

• Transform Boundary

Multiple Choice

• Continental-Continental  Convergent Boundary

• Oceanic-Continental  Convergent Boundary

• Oceanic-Oceanic Convergent Boundaryergent Boundary Boundary

Multiple Choice

• Continental-Continental  Convergent Boundary

• Oceanic-Continental  Convergent Boundary

• Oceanic-Oceanic Convergent Boundaryergent Boundary Boundary

Open Ended

What did you learn today?

Q and A​

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