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Q1
SCIENCE Q1
PLATE MOVEMENT
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Created by
MADAM FYANGIE
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Cards (26)
What is the term used to describe the layer of the Earth located beneath the lithosphere?
Asthenosphere
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What is the primary process that drives the movement of tectonic plates?
Convection current
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What are the key characteristics of convection currents?
Involves the rise and
fall
of materials due to
temperature
and density differences
Occurs in
fluids
(liquids and gases)
Drives the movement of
tectonic plates
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Which processes describe convection in the provided examples?
1 (Boiling of water), 3 (Rising of hot air balloon), and 5 (Melting of ice)
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What happens to the density of materials as they are heated?
The density
decreases
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What is the relationship between temperature and density in the context of convection?
As temperature
increases
, density decreases, causing materials to
rise
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What are the components involved in the lithospheric float process?
Blocks/woods (representing lithospheric plates)
Liquid/water (representing the asthenosphere)
Heat transfer due to differences in temperature and density
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What is the term for the cycle of rising and sinking materials in convection currents?
Convection cycle
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How does the temperature of magma compare to that of the mantle?
Magma is
less
dense and
hotter
than the surrounding mantle
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What is the significance of the asthenosphere in plate tectonics?
It allows
lithospheric plates
to float and move due to
convection currents
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What is the primary component of the Earth's core?
Iron
and
nickel
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What happens to materials in a convection current when they cool down?
They become
denser
and
sink
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What is the role of temperature in the convection process?
Temperature
differences drive the movement of
materials
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How do convection currents contribute to geological processes?
They facilitate the movement of
tectonic plates
, leading to earthquakes and
volcanic activity
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What is the layer beneath where the less dense hot molten material rises and sinks?
Mantle
What is the upper most layer of the Earth?
Lithosphere
Where do lithospheric plates flow in?
Asthenosphere
Which material rises?
Hot
Which material sinks?
Cool
or
cold
What are other forces that move the lithospheric plates?
Ridge
push,
sliding
and slab pull
What is the process wherein a heavier subducting plate pulls down the trailing slab into the subduction zone?
Slab pull
What is the process wherein the old oceanic crust becomes heavier and sinks under the new oceanic crust?
Ridge
, push or
gravitational sliding
What is the sequence of mantle convection?
The decomposition of radioactive elements causes heat in the interior part of the Earth.
Heat moves to the core.
Heat slowly rises to the mantle and creates a convection current
Lithosphericheric plates move in the asthenosphere due to the rising and sinking of materials
The process repeats as a cycle
How does the interior part of the Earth get heat?
Decomposition
of
radioactive
elements
Why does convection occur?
Differences in
temperature
and
density
What is convection a kind of?
Heat transfer
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