Today’s Agenda…

Bellringer: Draw a diagram of the Earth. Label the 4 layers.

ReviewNotes on Earth’s Moving PlatesExit Slip

Earth’s Moving Plates

Study Pack #3

Today’s goals…

I can explain how Earth’s plates move.

I can explain why Earth’s plates move.

Earth’s Plates

Earth’s lithosphere is the upper part of the mantle and the crust

The lithosphere is broken up into pieces called tectonic platesThey float on the mantleDifferent sizes and shapes

Earth’s Plates

Earth’s Plates

The plates move very slowlyAbout 2cm/yearThis has caused the position of the

continents to change over the yearsThe movement of these plates can

also cause changes in Earth’s surface

Plate Boundaries

The places where the edges of plates meet

Plates experience stress at boundariesConvergent DivergentTransform

Plate Boundaries

ConvergentPlates move toward each otherPlates experience a type of stress

called compression(pushing)The plates crumple up and form

mountainsSometimes one plates goes under the

other - subduction

Plate Boundaries

DivergentPlates move away from each otherPlates experience a type of stressed

called tension(pulling)New crust is formed causing a ridge

Plate Boundaries

Transform BoundaryPlate move past each otherA type of stress called shearing

occursThis causes faults or cracks in the

crustEarthquakes can occur here

Why do the plates move?

Convection currents in the mantle behave like a conveyor belt to move the plates

Exit Slip

Identify the plate boundaryConvergentDivergentTransform