DO NOW:Make a list of things you know that move or grow very slowly

How fast do they grow?

• Snail: 6 cm per minute• Tree Growth: 100 cm – 1000 cm per year (up

to 18 feet per year)• Hair: 1.25 cms per month• Fingernails: 2.3 cms per year (23 millimeters)• Staglagtites: 10 cms per 1000 years

• TECTONIC PLATES: 2.5 cms – 15 cms per year

Plate Boundaries

3 Types of Plate Boundaries

• No plate can budge without affecting the other plates surrounding it.

• As the plates move, they collide pull apart, or grind past each other producing changes in the Earth’s surface.

Divergent Boundary• A divergent boundary occurs when two plates

are moving apart• Magma rises to fill the gap

Rift Valleys and Mid-Ocean Ridges

Eventually, Rift Valleys become Mid-Ocean Ridges

Convergent Boundaries

• A convergent boundary occurs when two plates collide (run into each other)

Convergent Boundaries• The place where two

plate boundaries come together or converge is called a convergent boundary

• A collision is when two plates hit each other—the density of the crust determines which plate goes under the other one

Transform Boundary

• A transform boundary occurs when two plates slide past each other

Exit slip

• 1) Diverging a) Slding past each other

• 2) Transform b) Coming together• 3) Convergent c) moving apart