WGU D199 Summary and Test(Introduction to
Physical and Human Geography)Questions And
Answers (2025|2026) update!!
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humans began modifying the land surface for
in the last 10,000 years:
growing food with advent of agricultural revolution
coincides with a warm interglacial period that began
the agricultural revolution
about 11,700 years ago which is called the
roughly
HOLOCENE era (warm stable climate)
the last 270 years of the INDUSTRIAL REVOLUTION when climate pollution
holocene ushered into the began to increase dramatically
the industrial revolution fossil fuels
was powered by
the great acceleration (1950-present)
what began after world -caused depletion in the ozone layer
war II? -After 1950, the biodiversity of species started
decreasing and the extinction of species accelerated
Homo sapiens' truly massive global imprint on the
planet
The Great Acceleration -The climate has already warmed by 1°C since 1900.
marks the beginning of -If humans continue with business-as-usual
consumption of fossil fuels, the warming between
1900 and 2100 could exceed 4°C.
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, 7/13/25, 1:32 PM WGU D199 Summary and Test(Introduction to Physical and Human Geography)Questions And Answers (2025|2026) update!! Flas…
It is this trapping of heat energy that otherwise would
have escaped to space through the atmosphere
the greenhouse effect.
-allows solar radiation to enter
-the blanket effect
-Satellites routinely measure the incoming solar
energy and the outgoing heat energy from the planet
is the greenhouse effect
-Independently, the heat energy emitted by the
real?
surface has been estimated using observed surface
temperatures on land and sea.
-Visible smoke and smog are made up of tiny
particles
-carbon dioxide and other greenhouse gases cannot
aerosols
be seen by the human eye
-Most of these aerosols reflect sunlight and have a
cooling effect
-absorb solar radiation entering the atmosphere and
black carbon aerosols (a have a warming effect.
major component of soot) -warms the climate by absorbing solar energy rather
than infrared energy from the planet
-non-carbon dioxide greenhouse gases and black
carbon particles
super pollutants
-per molecule, their warming effects are much larger
than that of carbon dioxide.
The Northern Hemisphere the ocean's influence
has warmed more than the
Southern Hemisphere,
largely because
-another trillion tons of carbon dioxide will be added
At current emission to the atmosphere by about 2030
growth levels—that is, -At that point, the rate of climate change will be three
under a "business as usual" times faster than the pace experienced until now.
scenario -unchecked emissions will lead to warming that could
exceed 4°C
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