Aim: How do crustal plates interact with each other? Do Now: Choose one of the crustal movements we discussed yesterday and draw a picture depicting the motion.

UpliftedTilted FoldingFault

1.How many different types of plate boundaries exist on earths crust? 2.Identify the names of the plate boundaries.

Theory of Plate Tectonics Earth is broken up into tectonic plates The crustal plates are in slowly moving in constant motion driven by the convection currents in the asthenosphere Plate Boundary:

How can we describe a divergent plate boundary? Divergent plate boundary- two plates move apart (diverge or rift) mid-ocean ridge, rift-valley, shallow earthquakes, volcanoes at ridge Mid-Atlantic Ridge, Pacific Ridge boundaries/en/index.html?width=570&height=475&popup=true Type: Geologic Features: Examples:

How can we describe a Convergent plate boundary? Convergent plate boundary- two plates come together (collide or converge) –Continental vs. Continental Crust Mountain ranges, earthquakes, metamorphic rocks (folded & faulted) Himalaya Mountains Type: Geologic Features: Examples: boundaries/en/index.html?width=570&height=475&popup=true

undaries/en/index.html?width=570&height=475&popup=true How can we describe a Convergent plate boundary? Convergent plate boundary – Oceanic vs. Continental crust –Subduction- denser oceanic plate dives beneath a less dense continental plate. Trench, deep earthquakes, volcanic mountain range Peru-Chile Trench Type: Geologic Features: Examples:

aries/en/index.html?width=570&height=475&popup=true How can we describe a Convergent plate boundary? Convergent plate boundary (2 oceanic crusts) volcanic island arc, trench, deep earthquakes Alleutian Trench Type: Geologic Features: Examples:

How can we describe a Transform plate boundary? Transform plate boundary- two plates slide past each other Fault, earthquakes San Andreas Fault Type: Geologic Features: Examples: daries/en/index.html?width=570&height=475&popup=true

Summary Activity Identify and match the image on the appropriate plate boundaries

Extra Questions Identify the following plates

Exit Card Explain how convection currents play a role in crustal movement.

Identify a characteristic common to most crustal plates? Continental crust – granite rock, felsic, low density, light in color Oceanic crust – basalt rock, more dense, mafic, darker in color

How can we describe a divergent plate boundary? Divergent plate boundary- Type: Geologic Features: Examples:

How can we describe a Convergent plate boundary? Convergent plate boundary- Type: Geologic Features: Examples:

How can we describe a Convergent plate boundary? Convergent plate boundary – Type: Geologic Features: Examples:

How can we describe a Convergent plate boundary? Convergent plate boundary Type: Geologic Features: Examples:

How can we describe a Transform plate boundary? Transform plate boundary - Type: Geologic Features: Examples: