Download Evidence of plate movement

Evidence of plate
movement
I can prove that tectonic plates move by calculating the
distance and age between the Hawaiian islands.
Warm Up
• Review the earthquake map from yesterday.
On your warm up sheet, answer the following
questions:
1. Why are earthquakes mainly concentrated
in narrow bands?
2. Which parts of the United States have the
most frequent earthquakes?
Earthquake Depths and Locations around the World
Lithospheric Plates of the World
On the back of the
earthquake map…
• Shallow earthquakes occur at all plate
boundaries, and even in the middle of plates.
Deep earthquakes only occur at some plate
boundaries – why?
• Why might the
depth of an
earthquake be
related to the
amount of
damage it
causes?
Another difficult area for
Wegener…
How can we prove the
movement of the plates?
Examining Hot Spots
• In this activity, you will determine how
fast the Pacific plate is moving over the
hot spot that formed the Hawaiian
chain of volcanoes, which extends
3500 km northwesterly across the floor
of the Pacific Ocean.
What is a hot spot?
• An area where material from deep within the
mantle rises and then melts forming magma
• Can be found near plate boundaries or in the
middle of a plate
Hot spots & volcanoes
• Hot spots don’t move – the plates above
them do!
• A volcano forms above a hot spot when
magma erupts through the crust and reaches
the surface
• As the plate moves, new volcanoes will form
over the hot spot
Completing worksheet
• You will work through the packet individually,
calculating the distance between the islands
and then the ages. You will use this
information to calculate the speed of crustal
movement
• After completing all calculations, answer the
questions on the bottom half of the worksheet
Islands
Distance Between the Two Islands
(km)
Hawaii and Maui
Maui and Molokai
Molokai and Oahu
Oahu and Kauai
(cm)
Difference in
Approximate Ages of
the Two Islands (Years)
1) The bending of rock layers due
to stress
A. Fault
B. Compression
C. Folding
D. Tension
2) A break in a body of a rock
A. Divergent
B. Tension
C. Convergent
D. Fault
3) When hot rock deep within the
Earth rises, but cooler rock near
the surface sinks.
A. Mantle
B. Convection
C. Asthenosphere
D. Fault
4) 2 Tectonic Plates move past
each other horizontally.
A. Plate Tectonics
B. Transform Boundary
C. Divergent Boundary
D. Convergent Boundary
5) Type of boundary in which continental
crust is formed but oceanic crust is
destroyed.
A.Plate Tectonics
B.Transform Boundary
C.Divergent Boundary
D.Convergent Boundary
6) Type of boundary which creates
Granite.
A.Plate Tectonics
B.Transform Boundary
C.Divergent Boundary
D.Convergent Boundary
7) Type of boundary which creates
faults.
A.Plate Tectonics
B.Transform Boundary
C.Divergent Boundary
D.Convergent Boundary
8) Type of boundary in which no
magma is formed and crust is
neither created nor destroyed.
A.Plate Tectonics
B.Transform Boundary
C.Divergent Boundary
D.Convergent Boundary