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Earth
Interdependence
What internal energy
source is responsible for
the convection currents in
the earth’s
asthenosphere?
What is responsible for the
internal Energy source?
Radioactive
Isotopes decay
Gravity
Left over from
formation
What is the
external energy
source for the
Earth?
Sun’s Nuclear Fusion
External
Energy
Source
What is the reason
for the seasons on
the earth?
Seasons
We are closer to the Sun in the winter!
Title on axis
Sun’s path- time
of direct sunlight
If the convection currents in
the earth’s mantle were to
stop, how would the number
of earthquakes and volcanoes
be affected?
There would be fewer (less #’s)
Why is the
temperature on a
cloudless winter
night much colder
than if there were
cloud cover?
Clouds trap heat in!
(like a blanket)
How do surface
ocean currents
affect climate?
Water has a high specific heat, so it stabilizes
the climate.
Hot chases cold, currents move heat
from equator to poles.
As the wind flows down
the leeward side of the
mountain range, how
would the air be different
than the windward side?
Mountains cause a change in climate
Windward wet
Leeward dry and hotter
In which Earth layer
are most convection
currents that cause
seafloor spreading
thought to be located?
Be specific!
Asthenosphere- upper mantle
How did scientist
infer the outer core
is liquid?
Be specific!
Earthquake waves and the magnetic
field it produces Geomagnetic probe.
S-waves
P-waves
 Can’t
Can
travel
through liquids,
not enough
energy.
travel
through liquids
slowly, and do
travel through
the Earth.
The Earth’s inner
core is hotter than
the liquid outer core,
but it is still solid.
Why?
Inner Core –Fe & Ni is Under Pressure!!
How can volcanic
activity affect an areas
temperature?
Spewing dust , ash and
gases into the atmosphere.
Would Georgetown, KY
need to worry about the
effects of an
Earthquake? Why?
YES! Limestone Bedrock is solid an the
Madrid Fault runs through it.
A new island is forming
slowly in the Hawaiian
island chain.
Explain why and which
island is older.
Magma is rising
to surface
due to a HOT SPOT near the middle of a
tectonic plate.
What forms when
the sea floor
spreads apart?
Why?
Sea floor spreading=
New land,
trenches and
volcanos
What is usually
responsible for
an earthquake?
Slippage along
Real?
faults within the Earth’s crust
What causes the magma
inside a volcano to rise
toward the surface?
Think Pressure
High pressure
in a closed cavern;
due to rising temperature
Show offs
How is the Earth’s surface
changing over time?
Erosion and New formation
Erosion and New formation
Mt Everest –Himalayas tallest
New mountains can be formed
when land masses are being
pushed together due to plate
tectonics, and also from volcanic
activity. Mount Everest and the rest
of the Himalayas make up a
relatively young Mt. Chain. What
can you infer about Asia and India’s
plates?
India moving to Asia
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