Download Reshaping Earth`s Crust

Bell Questions 9/21/11
1. What do the strips in the model you made
yesterday represent?
2. What are two of the three causes of plate
motion?
3. List the three different kinds of tectonic
plate boundaries.
Reshaping Earth’s Crust
1. Rifting the process
by which Earth’s
crust breaks apart
2. Cratons large areas
of stable rock at the
center of continents
3. Terrane a piece of
lithosphere that has
a unique geologic
history.
4. Accretion The
terrane is scraped
off of the subducting
plate and becomes
part of the continent.
Effects of Continental Change
• When continents move, the flow of air and
moisture around the globe changes.
• As continents rift or as mountains form,
populations of organisms are separated.
When populations are separated, new
species may evolve from existing species.
Supercontinent Cycle
Supercontinent Cycle
Supercontinent Cycle
Supercontinent Cycle
Locations of Earthquakes in South
America, 2002-2003