Download Bell ringer- How do plate tectonics keep Earth inhabitable?

Bell ringer- How do plate
tectonics keep Earth habitable?
Earth is the only planet in the Solar System with plate
tectonics. The outer crust of the Earth is broken up into
regions known as tectonic plates. These are floating on top of
the magma interior of the Earth and can move against one
another. When two plates collide, one plate can go
underneath another.
This process is very important. When microscopic plants in the
ocean die, they fall to the bottom of the ocean. Over long
periods of time, the remnants of this life, rich in carbon, are
carried back into the interior of the Earth and recycled. This
pulls carbon out of the atmosphere, which makes sure we
don’t get a runaway greenhouse effect, like what happened on
Venus.
Without the plate tectonics, there’d be no way to recycle this
carbon, and the Earth would overheat.
notes on plate tectonics and heat
transfer
Evidence for Sea-Floor Spreading:
• Magnetic reversal—North & South poles
switch
• Small grains of magnetic materials align with
poles of Earth & harden in the rock as it cools
• When poles reverse, these small grains switch
• Earth’s magnetic field results from movement
in the outer core
Review your notes/worksheets on
Earth’s layers
• Quiz to follow
Ch 4 sec 3 page 108
1. What are the different plate
boundaries?
2. What force moves the plates?
3. How do scientists track plate
movement?
Sent up notes
Term
Your Definition
Picture example
Plate tectonics—plates that float on
asthenosphere and move around
Boundaries:
• Convergent
(Together)
(Mountains &
subduction)
• Divergent
(Apart)
(Sea-floor spreading)
• Transform
(Opposite)
(Earthquakes)
•Plate tectonic rap
What is heat transfer?
Heat Transfer—heat moving from one
place to another
• Conduction— heat transfer through solid materials
(leaving a metal spoon inside a pan of soup)
• Convection currents— movement of a fluid, caused by
differences in temperature, that transfers heat from one
part of the fluid to another
(hot air balloon, heating soup in a pan)
• Radiation— heat transfer through empty space
(sunlight, radiant heat, heat from oven)
Exit pass table quiz
• Study with your group
What’s popping
• Lab time! Lets review!
• What’s inside popcorn?
Reading time
• Page 108
• Rap it out
http://www.teachertube.com/viewVideo.php
?title=Plate_Tectonics_Rap&video_id=82280
• http://www.teachertube.com/viewVideo.php
?title=Plate_Tectonics&video_id=17144