Plate Boundaries

Plate Boundaries

Ms. Estropigan

Let's Review

Multiple Select

Do all the plates move in the same direction?

• No

• Yes

Multiple Select

Do you think the plates can change direction?

• No

• Yes

Multiple Select

Do you think all the plates move at the same speed?

• No

• Yes

Remember!

• Speed and direction of the plates may change.

• Plates can join to form one large plate.

• They can also separate into smaller pieces.

Multiple Select

What type of plate is Plate A?

• Continental

• Oceanic

Multiple Select

What type of plate is Plate B?

• Continental

• Oceanic

Open Ended

Why do you label Plate A and B as such?

Open Ended

What Happens to Plate A as it collides with Plate B? Why?

Oceanic trenches

Oceanic trenches are topographic depressions of the seafloor, relatively narrow in width, but very long. These oceanographic features are the deepest parts of the ocean floor. 

Multiple Choice

§What are the geologic processes/events that will occur out of this plate movement?

• island arcs and ocean trenches

• volcanoes and mountains

Multiple Choice

What geologic features might form at the surface of Plate A?

• island Arcs

• ocean trenches

Multiple Choice

If the edges of Plate A suddenly flicks upward, a large amount of water may be displaced. What could be formed at the surface of the sea?

• island Arcs

• ocean trenches

Multiple Choice

§The Earth’s Lithosphere were pushed from opposite ends, what do you think is formed in the lithosphere?

• mountains

• ridges

Multiple Choice

What other geologic event could take place with this type of plate movement?

• earthquakes

• rising magma

rift valley

A rift valley is a linear shaped lowland between several highlands or mountain ranges created by the action of a geologic rift or fault.

Great Rift Valley

mid-ocean ridge

A mid-ocean ridge is a seafloor mountain system formed by plate tectonics. It typically has a depth of ~ 2,600 meters and rises about two kilometers above the deepest portion of an ocean basin.

fissure vent

A fissure vent, also known as a volcanic fissure, eruption fissure or simply a fissure, is a linear volcanic vent through which lava erupts, usually without any explosive activity. The vent is often a few metres wide and may be many kilometres long.

Open Ended

What are common on the pictures?

Open Ended

§What do you think is happening to the Earth’s crust in those pictures?

Open Ended

If the event continues for million of years, what do you think will be the effect on the crust?

Open Ended

Why do you think it is important to get to know the plate boundaries?