Plate
Tectonics
Boundaries Earthquakes Volcanoes
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What was the name of the super
continent?
What was the name of the super
continent?
Pangaea
Who came up with the theory of
continental drift?
Who came up with the theory of
continental drift?
Alfred Wegener
Describe the theory of continental
drift in detail
Describe the theory of continental
drift in detail
•continents move away from each other
•Started as one large continent 250 million
years ago
•Plates move 1-2 cm per year
Give 3 pieces of evidence for
continental drift
Give 3 pieces of evidence for
continental drift
•Fossils found where they couldn’t live
•Continents seem to fit together
•Mineral deposits on edges of continents
Name the plate that we currently live
on and the plate directly to the West
of us
Name the plate that we currently live
on and the plate directly to the West
of us
North American plate & Pacific plate
Name the boundary that rubs past in
opposite directions and tell what it
can cause
Name the boundary that rubs past in
opposite directions and tell what it
can cause
Transform
Earthquakes
Name the boundary where plates
come toward each other and tell
what it can cause
Name the boundary where plates
come toward each other and tell
what it can cause
Convergent
Mountains
Name the boundary where plates go
away from each other and tell what it
can cause
Name the boundary where plates go
away from each other and tell what it
can cause
Divergent
Trenches and volcanoes
Name the boundary where one plate
sinks under another and tell what it
can cause
Name the boundary where one plate
sinks under another and tell what it
can cause
Subduction
Volcanoes
Name the volcano that is an
exception to the rule and explain
how it was made
Name the volcano that is an
exception to the rule and explain
how it was made
Hawaii
Magma pushing through the middle
of a plate
Name all three seismic waves
Name all three seismic waves
P-Primary
S-Secondary
L-Surface
What can Primary & Secondary
waves travel through
What can Primary & Secondary
waves travel through
P-solid and liquid
S-solid only
Name the transform boundary in the
U.S.
Name the transform boundary in the
U.S.
San Andreas Fault
How do geologist know that the
outer core is liquid?
How do geologist know that the core
is liquid?
Because the S waves do not come out
the opposite side of the earth (S wave
shadow)
How do geologist know that the
inner core is solid?
How do geologist know that the
inner core is solid?
Because of the way that the P waves
bend due to refraction as they go
through the Earth
What type of boundary do volcanoes
usually form on?
What type of boundary do volcanoes
usually form on?
Subduction
Name a volcano that has recently
erupted in the United States
Name a volcano that has recently
erupted in the United States
Mount St. Helen
Name the 3 possible statuses of a
volcano
Name the 3 possible statuses of a
volcano
Active, Dormant, Extinct
What is the bowl on the top of a
volcano called?
What is the bowl on the top of a
volcano called?
Caldera
Name the 3 types of volcanoes and
tell how each is formed
Name the 3 types of volcanoes and
tell how each is formed
Shield- oozing lava
Cinder cone- exploding rocks & ash
Composite or Strata cone- alternates
What is the difference between
Magma & lava?
What is the difference between
Magma & lava?
Magma is in the Earth, Lava is on the
Earth
What are the scientists called who
study the Earth?
What are the scientists called who
study the Earth?
Geologists
How long ago did Pangaea exist?
How long ago did Pangaea exist?
200-300 million years ago
What allows the plates to move?
What allows the plates to move?
The asthenosphere
Where do almost all volcanoes and
earthquakes occur?
Where do almost all volcanoes and
earthquakes occur?
On plate boundaries