1. Warm Up
1) Take out your Vocabulary Chart and make sure it is complete so I can come around and give you credit.

2. Plate Tectonics Chapter 25 Section 1 Earth’s Internal Processes
Earth’s surface is broken into large pieces
called plates. These plates move slowly, floating on the
lower layers

4. Plate Tectonics Chapter 25 Section 1 Earth’s Internal Processes
Earth’s surface is broken into large pieces
called plates. These plates move slowly, floating on the
lower layers
2 types of plates
1. Continental plates
2. Oceanic plates
Made of thick crust that is not very dense
Made of thin crust that is more dense than Continental
crust

5. Continental vs. Oceanic Crust
Notice that the Oceanic Crust is thinner than the Continental crust

6. Plate Tectonics Chapter 25 Section 1 Earth’s Internal Processes
Earth’s surface is broken into large pieces
called plates. These plates move slowly, floating on the
lower layers
2 types of plates
1. Continental plates
2. Oceanic plates
Plate Boundaries
-3 types
1. Convergent
2. Divergent
3. Transform
Made of thick crust that is not very dense
Made of thin crust that is more denser
Area where two plates interact
Area where two plates collide
Area where two plates move apart
Area where two plates slide past each other

7. Identify the boundary type.
Divergent
Convergent
Transform

8. Chapter 25 Section 1 Earth’s Internal Processes
Notes from video
Divergent boundaries
-As plates move apart from each other, magma rises up to
fill in the gap and forms new rock
-When happens on ocean floor a Mid Ocean Ridge forms
-When happens on continent a rift forms
-Rocks are youngest closest to the divergent boundary
Convergent boundaries
Three types:
1. Continental-Continental
collision
2. Continental-Oceanic
collisions
Oceanic-Oceanic
-When continental crust pushes against continental crust,
mountains form.
-When continental crust pushes against oceanic crust,
oceanic crust sinks under the continental crust. This is
called subduction. A trench and volcanoes form.
-When oceanic crust pushes against oceanic crust, one
plate sinks and very deep trenches are formed
-Strange life forms are found in these trenches

9. Transform boundaries Convection currents
Chapter 25 Section 1 Earth’s Internal Processes
Transform boundaries
Convection currents
When plates slide past each other, Earthquakes occur
San Francisco is an example.
Motion of plates is caused by motion of magma called
convection currents

12. Transform boundaries Convection currents
Chapter 25 Section 1 Earth’s Internal Processes
Transform boundaries
Convection currents
When plates slide past each other, Earthquakes occur
San Francisco is an example.
Motion of plates is caused by motion of magma called
convection currents
Draw a picture of convection currents
Notes are finished for section 1
Reread all of your notes