So how many licks
would it take to get
to the center of the
Earth?
Ummm . . .don’t try this at home
Earth has three layers – same
proportions as an apple
Plate techtonics – lithosphere =
crust + top layer of asthenosphere
Three types of boundaries
Convergent plates – subduction
causes orogeny
Divergent plates
• What rock type is
produced?
Iceland’s geothermal energy
Review – how does geothermal
work? Advantages?
Disadvantages?
Transform faults
Hot spots – place where magma
rises to Earth’s surface & cools
• Which island
must be the
youngest? So
where is the hot
spot and which
way is the plate
moving? Support
your inference
with
observations.