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Plate Tectonics - Jeopardy
Earth Layers
Theories
Boundaries
Earthquakes
and a few
other things
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Final Jeopardy
Boundaries: 80 points
What type of boundary is this?
oceanic – oceanic divergent
Boundaries: 90 points
What type of boundary is this?
Continental – continental
convergent
Earths Layers: 90 points
What causes the mantle to be hot
enough for convection to occur
there?
Radioactive decay in the Earth’s core
releases energy to the mantle – some
areas are hotter than others
Earths Layers: 10 points
What is the inner most layer of the
earth called?
Inner core
Earths Layers: 20 points
What is the outermost layer
called?
crust
Earths Layers: 30 points
Describe the physical properties
of the asthenosphere.
Solid but acts like plastic –
convection occurs in it.
Earths Layers: 40 points
What is the lithosphere made up
of (layers included)?
Crust plus the outermost
mantle
Earths Layers: 50 points
What is the state of the outer
core and what is it made of?
Liquid – iron and nickel
Earths Layers: 60 points
What is the state of the inner core
and what is it mainly made of?
Solid - iron
Earths Layers: 70 points
What is the thickest single layer
of the earth?
The mantle– 3000km
Theories: 10 points
What is the supercontinent that
existed 270 million years ago?
Pangaea
Theories: 80 points
Where does sea floor spreading take
place and what does it mean?
Mid ocean ridge – divergent
boundary – the ocean floor is getting
wider
Theories: 20 points
Geometry (puzzle piece) is evidence
of what theory?
Continental drift
Theories: 30 points
Give one other piece of evidence
for continental drift
Puzzle fit, matching mountain ranges,
ancient fossils on distant coast lines,
coal deposits in Antarctica, glaciers in
Africa
Theories: 40 points
What was missing from Wegner’s
theory of continental drift?
He didn’t know how the
movement occurred (theory of
plate tectonics was unknown)
Theories: 50 points
In order for Antarctica to have
tropical coal deposits – where must
it have been located before?
Near the equator or in the
tropics
Theories: 60 points
What was discovered during the
World War II that helped form the
theory of plate tectonics?
Mid – Atlantic ridge
Theories: 70 points
Give one piece of evidence for
sea floor spreading
Magnetic reversal patterns,
radioactive dating, volcano and
earthquake patterns
Boundaries: 30 points
What forms at a continentalcontinental divergent boundary?
Rift valley
Boundaries: 20 points
What forms at a oceanic- oceanic
divergent boundary
Mid ocean ridge
Boundaries: 60 points
What forms at a continentalcontinental convergent boundary
Mountain range
Boundaries: 50 points
What forms at a oceanic-oceanic
convergent boundary
Island arc, trench
Boundaries: 40 points
What forms at an oceaniccontinental convergent boundary?
Trenches, mountain ranges
Boundaries: 10 points
What type of events takes place
at a transform boundary?
Earthquakes, faulting
Earths Layers: 80 points
Describe mantle convection –
how does affect the plates?
Hot mantle rises, cools and sinks –
carrying the plates with it
Boundaries: 70 points
Describe subduction and
where/why it takes place
The denser plates goes below the less
dense plate – so oceanic will subduct
below continental. Gravity helps pull
the denser plate down into the mantle.
Earthquakes & Other: 10 points
What is a hot spot? And what
can it cause?
An area of very hot mantle, heated by
concentrated radioactive substance in
the core – it forms volcanoes
Earthquakes & Other: 20 points
Where is the focus found and
what starts there?
Down in the lithosphere (crust) –
earthquakes start there
Earthquakes & Other: 30 points
Where is the epicentre found
compared to a focus?
On the surface directly above the
focus
Earthquakes & Other: 40 points
What is the difference between a
shallow and deep-focus earthquake
In the crust vs. down into the mantle
Earthquakes & Other: 50 points
What is the difference between a
P and S wave
P waves are faster (compression/expand)
than S waves (move up and down)
Secondary waves cannot pass through
liquids
Earthquakes & Other: 70 points
How do Seismic waves (P and S) tell
us about the composition of the
earth’s core?
Secondary waves can not pass through
liquids so by monitoring waves from
earthquakes you can detect that the
outer core must be liquid.
Earthquakes & Other: 60 points
What is ridge push?
The hot mantle pushes the crust up
as the ridge forms.
Earthquakes & Other: 80 points
What is slab pull?
The slab is pulled down by gravity as
the plate subducts
Final Jeopardy
Why are older mountains and volcanoes
smaller than younger ones, such as the
Himalayas?
If tectonic activity has slowed or ceased in
an area, the effects of weathering and
erosion will no longer be “balanced” by
mountain-building processes, causing the
particular landform to become smaller