Label the layers of the earth below:
Plate tectonics is a geological theory that says
the surface of Earth is broken into large plates. The size
and position of the plates changes over time. The plates
move in three ways:
Convergence occurs when the plates move together
and collide. This causes mountains to develop.
Divergence occurs when the plates move away from
each other. At that time, molten rock rises and cools
and adds new material to the edge of the ocean crusts
Transform faults occur in the horizontal movement
of plates against each other. This causes earthquakes.
Now you are to make a simulation of plate tectonics. Follow
the directions below to make a box that looks like the one
below. Cut a long very thin strip in the top and cut holes
in both sides of the box.
Take two sheets of blue paper to represent
the oceanic plate. On both sheets place a triangular tube
to represent the plate with an oceanic and continental
crust. (Brown cardboard works well.)
Put the unattached sides of the papers through the slit
so that only about half of the paper is showing. When the
paper is pulled down, this represents the convergence of
the plates. When the paper is pushed up, this represents
the divergence of the plates.
Move only the sheet with the cardboard
attached so that the cardboard comes to the edge of the slit.
This represents the ocean plate disappearing beneath the
edge of the continent. This is called subduction.
On the plain sheet of blue paper, attach another triangle so that this also
has a continental and an oceanic crust. Now pull both sheets of blue paper
from the bottom. If you do this carefully, one of the triangles will go on
top of the other showing the development of mountains when convergence occurs.
If the layers are moved toward the sides of the
box, the students can see the action of fault lines moving
in an earthquake. This is called a transform fault.
Go to RLINK http://www.ucmp.berkeley.edu/geology/tectonics.html and
see an animation of the plates moving into the position they
Write a paragraph to explain what
you discovered when you followed the steps listed above.
Be sure to use the correct terminology. Also make a diagram
showing one of the
and what happened when you did what you were asked to do.