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