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Earth’s
Layers
Convection
Currents
Continental
Drift
Sea-Floor
Spreading
Plate
Tectonics
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Earth’s Layers
Which of the Earth’s layers
has the highest temperature?
Core
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Earth’s Layers
Which of the Earth’s layers is
the thinnest?
Crust
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Earth’s Layers
Earth is like a giant magnet
because of convection
currents in what layer?
Outer core
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Earth’s Layers
Continental crust is made
mostly of the rock_____.
Granite
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Earth’s Layers
Does pressure increase or
decrease inside Earth from
the crust to the core?
It increases
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Convection
Currents
The transfer of heat by the
movement of particles in
fluids is called__________?
Convection
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Convection
Currents
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Why do Earth’s plates move?
Convection currents in
the mantle cause the
plates to move.
Convection
Currents
The transfer of energy
through space is _______.
Radiation
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Convection
Currents
The transfer of heat between
objects that are touching is
____.
Conduction
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Convection
Currents
What happens to hot and cold
materials inside the mantle?
Hot materials rise, while
cooler materials sink.
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Continental
Drift
What is subduction and what
does it do?
Happens in deep-ocean
trenches or convergent
boundaries. One plate
moves under another
tectonic plate and sinks
into the mantle.
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Continental
Drift
What is the process in which
continents slowly move
called?
Continental drift
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Continental
Drift
What is a spreading
boundary?
Boundaries that move
away from one another
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Continental
Drift
What is a sliding boundary?
Boundaries that move
past each other in
opposite directions side
by side.
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Continental
Drift
The asthenosphere
occurres between which
two layers and causes
what.
It occurs between the
crust and the mantle. It
causes continental drift.
$500
Sea-Floor
Spreading
What happens in sea-floor
spreading?
New rock forms
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Sea-Floor
Spreading
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Continental plates that move
apart form _______ valleys.
Rift
Sea-Floor
Spreading
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Mid-ocean ridges occur at
________ boundaries.
Spreading
Sea-Floor
Spreading
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The oceanic crust is made of
___________.
Basalt
Sea-Floor
Spreading
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Where does sea-floor
spreading take place?
Lithosphere
Plate Tectonics
What is the boundary where
two plates push together
called?
Colliding boundary
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Plate Tectonics
Name the processes that
happen as a result of different
kinds of boundaries.
Mountain ranges, deepocean trenches
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Plate Tectonics
Two plates move past each
other in opposite directions at
a __________ boundary.
Sliding
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Plate Tectonics
What is a colliding boundary?
Boundaries that push
towards each other
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Plate Tectonics
Name three kinds of plate
boundaries.
Colliding, Spreading, Sliding
$500