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Physics for Future Presidents (Test 2)
Terms in this set (14)
The IPCC is important because their publications represent
consensus among scientists and politicians
Which of the following is not a major greenhouse gas?
CFCs (such as Freon)
The principal contribution to the temperature of Earth is
heat absorbed by sunlight
If there were no greenhouse gases, Earth's average temperature would be
You've all heard about "greenhouse gasses" in the atmosphere. Which gas plays the largest role in trapping heat energy from the sun?
Which statement best describes our current scientific understanding of the Earth's average temperature?
We have a good theoretical understanding of the Earth's average temperature
The amount of CO2 in the air is ~410 ppm and is increasing. How do we know?
CO2 sensors around the planet
The amount of CO2 in the air changes up and down naturally by about 10 parts per million each:
Scientists get information about the amount of CO2 in the air over the last couple of thousand years from studying
All of the above (tree ring width, isotope variation in ice cores, ocean and lake sediments, & glacier length records)
Precise instruments show that over the last 60 years the amount of carbon dioxide in Earth's atmosphere has changed by:
about a third (33% increase)
The amount of carbon dioxide in the air is currently higher than any time in the last (choose the largest answer that is correct)
The best way to quantify the average temperature of the Earth over the last 100 years is from
temperature measurements from thousands of meterological stations, bouys, and ships around the globe
Choose the statement which is most correct:
Scientists are pretty sure that the average surface temperature of the earth has increased by at least one-half degree C over the last 50 years.
The amount of CO2 emitted by humans during the industrial period amounts to
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