RAP

• 1. _____where two plates collide • 2. _____forms from high temperature and

low pressure• 3. _____deepest part of the ocean floor• 4. _____ lower mantle• 5. _____daily rise and fall of Earth’s

oceans

Plate Boundaries Key Questions

• 1. What are the features at a convergent boundary?

• 2. What are the features at a divergent boundary?

• 3. What are the features at a transform boundary?

Convergent Plate Boundary

1. Oceanic-Oceanic2. Continental-

Continental3. Continental-

Oceanic

Features:• Mountains• Trenches• Volcanoes

Continental-Oceanic Convergent Boundary

More dense Oceanic plate subducts (slides) below the Continental plate.

Features:o Trencheso Volcanoeso Mountains

Oceanic-Oceanic Convergent Boundary

• Subduction

of the older more dense

Oceanic Plate

• Forms a trench or

volcanic islands

Continental-Continental The plates buckle up and forms mountain ranges .

Features of Divergent Boundary:

Mid-Ocean Ridge

Rift Valleys

Volcanoes

Transform Boundaries

• Earthquakes occur at transform boundaries.

World’s Largest Earthquake9.5 Magnitude, Chile 1960

World’s Largest Earthquake

• 9.5 Magnitude• Southern Chile 1960• Estimated 5,700 killed• 3,000 injured• 717 initially missing

from Chile• 2,000,000 people left

homeless• 58,622 houses

completely destroyed

Transform Plate Boundary

Features:• Earthquakes• Faults

California San Andres Fault

• Fault line: San Andres Fault

• Transform Boundary

• Fence line moved 8.5 feet

• 1906 • San Francisco

Earthquake

California on 2 Tectonic Plates

• Los Angeles on the Pacific Plate

• Rest of USA on the North American Plate

• Fault line: San Andres Fault

• Transform Boundary