Most of the excessive carbon dioxide that is expected to cause global warming is generated by

burning of fossil fuels & production of cement & clearing of forests only

Which of these is true about ways that we might slow climate change, according to climate pol‐ icy analysts?

Developing a variety of existing strategies

Which of these best describes observed changes in production & IPCC model scenarios of expected production?

Observed CO production has exceeded the worst model scenarios.

What are the ecological implications of global warming?

Plants and animals may not be able to move to a suitable habitat.

The correct sequence of atmospheric zones upward from the earth's surface is

troposphere, stratosphere, mesosphere, thermosphere.

Given what we know about the likelihood of climate change, the best thing to do is

severely cut back on production of greenhouse gases.

Which of the following describes the pattern of change in global average temperature?

Since 1970, the ave. global temp. has not been below 20th century average

produced anywhere organic matter decays without oxygen

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Unit 7 Human Impact

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Questions 20

Answers

1
The “Keeling curve” showing measurements shows that concentrations of co2 have reached approximately what level
1000 ppm
400 ppm
200 ppm
350 ppm
2
The hole in the ozone layer is larger today than it was in 1985.
False
True
3
Which of following has the highest temperature?
ozone layer
stratopause
mesopause
tropopause
4
Change in ocean temps brought on by climate change could lead to an extreme cold period in Europe due to a change in the
albedo increases.
thermohaline circulation.
reductions in El niño/La niña oscillation.
Milankovitch cycles.
5
Which of these is NOT among our most important greenhouse gases?
fluorine gases (such as CFCs)
methane (CH4 )
nitrous oxide (N2O)
sulfur dioxide
6
Most of the excessive carbon dioxide that is expected to cause global warming is generated by
burning of fossil fuels.
burning of fossil fuels & production of cement & clearing of forests only
green plants.
production of cement and clearing of forests.
7
Which of these is true about ways that we might slow climate change, according to climate pol‐ icy analysts?
Developing a variety of existing strategies
climate “wedges,” but these will cause considerable social disruption.
There is no way to slow climate change.
Slowing change is impossible without new technologies.
8
Which of these is unlikely to result from climate change?
warmer average temperatures
the change in distribution patterns of birds
increased drought in agricultural regions resulting in famine
movement of tectonic plates
9
All of the following are aspects of climate change except
declining sea level.
increase in surface ocean water temperature.
rapid melting of the polar ice sheets and Greenland glaciers.
increase in Earth’s average temperature
10
________________ stated that signatory nations must reduce emissions of greenhouse gases below 1990 levels by 2012.
United Nations
U.S. Military Advisory Board
ENSO
Kyoto Protocol
11
Atmospheric carbon and nitrogen most likely first came from ______.
runof
volcanoes
animal decomposition
plants
12
Which of these best describes observed changes in production & IPCC model scenarios of expected production?
Model scenarios overestimated CO production
CO production matches the middle range of model scenarios.
Observed CO production has exceeded the worst model scenarios.
Model scenarios predicted CO production about right.
13
What are the ecological implications of global warming?
biodiversity will be higher
habitats for plants and animals will increase in area.
plants and animals will probably benefit from warmer temperatures
Plants and animals may not be able to move to a suitable habitat.
14
The correct sequence of atmospheric zones upward from the earth's surface is
troposphere, mesosphere, stratosphere, thermosphere.
troposphere, stratosphere, mesosphere, thermosphere.
stratosphere, troposphere, mesosphere, thermosphere.
mesosphere, stratosphere, troposphere, thermosphere.
15
Given what we know about the likelihood of climate change, the best thing to do is
wait and see how much temperatures change before we change our habits.
not worry about greenhouse gas production.
immediately cease all industrial activity.
severely cut back on production of greenhouse gases.
16
________________ means that net-greenhouse gas emissions are zero.
Carbon level
Adaption
Carbon tax
Carbon neutral
17
Which of the following describes the pattern of change in global average temperature?
Since 1970, the ave. global temp. has not been below 20th century average
As the 20 th century average increases, the temperature increases.
warmer than the 20 century ave. up through 1950, but has stabilized since.
yearly temp. have been different
18
Paying to plant trees because you use carbon in your daily life would be an example of
carbon reduction.
going carbon neutral
carbon offsets
carbon production [ambiguous].
19
There has been an increase in frequency and intensity of storms and hurricanes
False
True
20
Methane is
the main anthropogenic greenhouse gas produced worldwide.
declining in developing countries since many of its uses have been banned.
accumulating three times as fast as CO2 in the atmosphere.
produced anywhere organic matter decays without oxygen

Unit 7 Human Impact Flashcards | StudBud