9/21/11LEQ: How do plate boundaries change the shape of our earth? (complete sentences!)

1. What do you think the word “boundary” means? (write a definition in your own words!)2. What do we call the giant slabs of lithosphere that cover the surface of our earth? 3. How is a tectonic plate similar to a dinner plate? 4. Make a list of everything you know about earthquakes and volcanoes!! (bullets are fine!)

ACTIVATING STRATEGY• Discovery Ed: earthquake footage

How do earthquakes and volcanoes change

the shape of our earth?

Today’s LEQ: How do plate boundaries change the shape of our earth?

By the end of today, you should be able to…

1. Name the 4 types of plate boundaries2. Describe how the 4 types of boundaries

move3. Explain the geologic changes that each

boundary creates

KEY VOCABULARY

12. Convergent Boundary13. Divergent Boundary14. Transform Boundary15. Subduction Boundary

GROUP READING:______BOUNDARIES

1. 2. 3.

WRITE THE NAME OF THE PLATE BOUNDARY YOU ARE READING HERE!

BECOME AN EXPERT!a) Read the text aloud as a group.b) After your group finishes reading, answer the following questions TOGETHER in your notebook

1. What happens to the tectonic plates at your plate boundary?

2. What are the EFFECTS of your plate boundary?

3. What is an EXAMPLE of the plate boundary you read about?

SHARE YOUR KNOWLEDGE!!

TEACH your new group about the article you read!

**Use your answers to questions 1-3 to help you! You are the only person in your group who knows

anything about your specific type of boundary. YOU ARE THE EXPERT!! HELP YOUR CLASSMATES

LEARN!!**

TECTONIC PLATE BOUNDARIES

1.

2.

3.

4.

Draw this in your

notebook!

Leave space here!

Make this Chart!!

BOUNDARY NAME PICTURE EFFECTS MEMORY

TRICK

TECTONIC PLATE BOUNDARIES

What Did You Learn?

• Check and correct your notes as I quickly review them

• Be ready for me to call on you!

Divergent Boundary

• PICTURE: move away from each other

• Effects:•-magma from mantle cools to create new crust•-continents pull apart or the ocean floor spreads

• DIVERGENT boundaries DIVIDE

Convergent Boundary• PICTURE: two plates moving towards each

other

• EFFECTS: crust is pushed together and destroyed

• -continents smash together• -mountains are formed

• -CONVERGENT boundaries COLLIDE

Transform Boundary• PICTURE: two plates sliding past each other• Effect:

• -plates scrape against each other• -crust isn’t created or destroyed• earthquakes happen

• MEMORY TRICK: -DJ TRANSFORM!

Subduction Boundary• PICTURE: two plates are moving towards each

other, the denser oceanic crust sinks under continental crust

• EFFECTS: • -oceanic crust and continental crust collide • -more dense oceanic crust sinks under less dense

continental crust

• Subduction boundaries, oceanic plates Sink

NAME THAT BOUNDARY!

PLATE BOUNDARY HAND MOTIONS

HOT Q!!!SUBDUCTION is a special type

of one of the other three boundaries.

What type of boundary is it??

CONVERGENT!!!

PLATE BOUNDARY IDENTIFICATION:

HOLD UP THE TYPE OF BOUNDARY YOU SEE!

DIVERGENT1.

SUBDUCTION2.

DIVERGENT3.

CONVERGENT4.

DIVERGENT5.

CONVERGENT

6.

SUBDUCTION7.

TRANSFORM8.

CONVERGENT9.

TRANSFORM10.

CONVERGENT11.

TRANSFORM12.

DIVERGENT13.

TRANSFORM14.

SUBDUCTION15.

SUBDUCTION16.

DIVERGENT!17.

SUBDUCTION18.

TRANSFORM19.

DIVERGENT20.

HOT Q: The process of subduction tells us something about the density of oceanic

crust compared to continental crust. What can we say about to compare the density

of the two?

SUMMARIZER:

1. In your notebook draw a picture of all four types of plate boundaries

2. Label each one3. Write 1 EFFECT of each type of boundary

(you may use bullets—this does not need to be in complete sentences!)