Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

No, thanks

Theory of Plate Tectonics

No description
by

Alicia Bartels

on 6 October 2015

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Theory of Plate Tectonics

Theory of Plate Tectonics
Theory of Plate Motion
Earth's lithosphere, like a dropped hard boiled egg, is broken in irregular pieces.
Theory of Plate Motion Con't
No plate can budge without affecting the other plates surrounding it.
Plate Boundaries
The edges of different pieces of the lithosphere meet at lines called plate boundaries and they extend deep into the lithosphere.
Transform Boundaries
Crust is neither created nor destroyed.
Divergent Boundaries
The place where two plates move apart, or diverge, is called a
divergent plate boundary
.
Convergent Boundaries
The place where two plates come together, or converge, is called a
convergent boundary
.
Convergent Con't
Plate Movement
Move extremely slow: about 1-10 centimeters per year.
The pieces, or separate sections of the Earth are called
plates
; they fit closely together along cracks int he lithosphere.
Plate tectonics is the geological theory that states that pieces of Earth's lithosphere are in constant, slow motion, driven by convection currents.
The theory of plate tectonics explains the formation, movement, and subduction of Earth's plates.
Move from the convection currents in asthenosphere. Just floating on top.
Cause changes in the world such as volcanoes, mountain ranges, and deep-sea trenches.
Faults
, breaks in Earth's crust where rocks have slipped past each other, form along plate boundaries.
Three kinds of boundaries:
Transform
Divergent
Convergent
A place where two plates slip past each other, moving in opposite directions.
Earthquakes occur frequently along these boundaries.
Most divergent plate boundaries occur at the mid-ocean ridge. They also occur on land, when two of Earth's plates move apart.
A deep valley called a
rift valley
forms along the divergent boundary, like the Great Rift Valley in east Africa. As the rift valley widens, the floor drops making the land more susceptible to the sea flooding.
Three types of collision:
oceanic crust and oceanic crust
Most dense plate dives and melts in magma, creating a subduction area.
oceanic crust and continental crust
Most dense plate, oceanic crust, dives and melts in magma, creating subduction and deep-ocean trenches.
continental crust and continental crust
Equal density, creates mountain ranges.
When two plates collide, density determines which one will go on top. Oceanic crust is made of Basalt, making it denser than continental crust, made mostly out of Granite.
What is the closest comparison of continental movement speed?
a. fingernail growth
b. sunflower growth
c. bacterial growth
Full transcript