Download Plates Move

Plates Move
Good Morning!
 Take out your homework, have it on your desk so we
can come around and check it in.
 Get all your materials then, put bags in the back.
 Pick up a green sheet of paper off the front table.
 Work on the Day 5 activity. You are rating your
learning and answering three questions.
 If you were absent yesterday, come in during Ac.
Lab for an alternative assignment.
Question 1
 Did both trials result in the movement of water?
Why or why not?
 Only trial 1, in which the warm water was placed
in the vial, resulted in the movement of water
(the warm water rose upward and outward).
There was no movement of water in Trial 2. This is
because warm water rises and cold water sinks.
In Trial 2, the warm water was already on top and
the cold water was at the bottom.
Question 2
 What do you think is necessary for a convection
current to form?
 It is necessary for warm water to be at the
bottom (heated from below) and the cooler
water to be sitting above it. It is the rising of
warm water and its resulting displacement of the
cool water that results in the formation of a
convection current.
Question 3
 Compare the results of your two trials. When
warm water and cold water are mixed, what
happens to:
 A. The warm water? It rises to the top
 B. The cold water? It sinks to the bottom.
Question 5
 Imagine the hotter magma is lying beneath an
area of cooler magma deep in the mantle.
What do you predict will happen? Why do you
think this?
 The hotter magma would rise and the cooler
magma would sink. This would results in a
current. In this activity, water was used to model
magma, so what happened to the water, would
happen to the magma.
What do scientists believe
causes plates to move?
 Convection currents within the earth’s mantle
caused by differences in temperatures of
magma within the mantle.
Schedule
Plate Movement Notes 15-20 minutes
ABCD Card Review
10 Minutes
Comic Strip Activity
30-40 Minutes
Exit ticket
5-10 Minutes
Plates move
 Plates are what move
 They move what is on top of them
 Crust is on top of the plates
 Continental Crust- The crust that makes up
continents/land
 Oceanic Crust- The crust that makes up the oceans
Divergent Boundary
 Plates move apart
 Most are found in the ocean
 Mid-ocean ridges are found where this happens
 In the ocean they move apart and riff valleys
form
 This is how continents split apart
 New crust is formed
Process
 1. Hot material rises from the mantle
 2. The heat causes the crust to bulge upward
 3. The crust cracks, and a riff valley is formed
 4. Magma rises, the continent splits apart
Transform Boundaries
 Plates move past each other in opposite
directions
 Crust is not formed or destroyed
 Occur mostly at the sea floor but can form on
land too
 San Andreas Fault
Convergent Boundary
 Plates push together
 3 different types
 Continental-continental collision
 Oceanic-oceanic collision
 Oceanic- continental collision
 Crust is destroyed or folded
Continental- Continental
Collisions
 Two continental plates collide
 Each plate is the same density
 No plates can sink, so it has to collide
 Mountains are made when the two plates run
into one another
 EX: Rocky Mts.
Oceanic- Continental
Collision
 An piece of oceanic crust runs into a piece of
continental crust
 Oceanic crust sinks
 Deep-ocean trenches
 Costal mountains
 EX: Andes Mts.
Oceanic-Oceanic Collision
 2 plates run into one another
 The older plate will sink under the newer plate
 Subduction- When one plate sinks beneath another
 The plate moves into earth, and melts
 Forms
 Deep ocean trenches- deep canyons on the ocean
floor
 Island arcs- volcanic islands
 EX: Hawaii
Hot Spot
 Heated rock rise in plumes, are thin columns from
the mantle
 The magma eventually hardens
 The magma could have risen so high that it
peaks out of the water
 More islands will form in an arc, this shows how
the plate is moving
 EX: Hawaii
Schedule
Plate Movement Notes
15-20 minutes
ABCD Card Review
10 Minutes
Comic Strip Activity
30-40 Minutes
Exit ticket
5-10 Minutes
Review
 In what direction do plates move in convergent
boundaries?
 A. Towards each other
 B. Away from each other
 C. Depends on stress
 D. Past each other
Review
 In what direction do plates move in transform
boundaries
 A. Towards each other
 B. Away from each other
 C. Depends on stress
 D. Past each other
Review
 In what direction do plates move in divergent
boundaries
 A. Towards each other
 B. Away from each other
 C. Depends on stress
 D. Past each other
Review
 What feature occurs at a divergent boundry
 A. Island arc
 B. Riff valley
 C. Mountains
 D. surface fault
Review
 The Andes Mountains in South America occur at
what type of boundary?
 A. Continent-continent convergent boundary
 B. Continent-oceanic convergent boundary
 C. Divergent boundary
 D. Transform boundary
Schedule
Plate Movement Notes
15-20 minutes
ABCD Card Review
10 Minutes
Comic Strip Activity
30-40 Minutes
Exit ticket
5-10 Minutes
Schedule
Plate Movement Notes
15-20 minutes
ABCD Card Review
10 Minutes
Comic Strip Activity
30-40 Minutes
Exit ticket
5-10 Minutes