EARTH114 Quiz Answers.pdf

Quiz #1 Question 1 The Earth's average surface temperature is currently: 50 degrees F 59 degrees F 50 degrees C 59 degrees C Question 2 Which of these provides the best description of the connection between climate and weather? Weather and climate are unrelated Climate is what you expect; weather is what you get Neither weather nor climate are predictable Weather is the average of climate Question 3 Multiple studies have concluded that over the last 50 years, Earth's average surface temperature has warmed nearly _________. 2 degrees C 5 degrees C 10 degrees C 1 degree C Question 4 Ann Arbor's average annual temperature is ______________. 50 degrees F 5 degrees C 15 degrees F 50 degrees C Question 5 Which one of these is NOT a greenhouse gas in our atmosphere? CH4 CO2 N2O O2

Question 6 What is the current level of carbon dioxide in the atmosphere? 315 ppm 215 ppm 0.0419% 2% Question 7 Greenhouse gases in our atmosphere are infrared active. True False Question 8 A temperature anomaly of 1 degree C is equal to a temperature anomaly of 1.8 degrees F. True False Question 9 Long term temperature records for the Earth, as concluded by 6 different climate research groups, show that each of the last 50 years has been warmer than the preceding year. True False Question 10 Climate is the average state of the atmosphere, averaged over a long period of time. True False

Quiz #2 Question 1 Currently (as of 2021), carbon dioxide levels in the atmosphere are increasing at an average rate of about: 10 ppm per year 2 ppm per year 20 ppm per year 50 ppm per year Question 2 Global anthropogenic emissions of carbon to the atmosphere are currently: about 1 Gigaton per year about 100 Gigatons per year about 10 tons per year about 10 Gigatons per year Question 3 What is the natural (i.e., pre-industrial, or pre-anthropogenic) range of CO2 in our atmosphere, according to the ice core record? about 180 to 280 ppm about 0-50 ppm about 300-500 ppm about 50-150 ppm Question 4 About half of all global anthropogenic emissions of carbon dioxide into the atmosphere ends up: being lost to outer space being absorbed by the land staying in the atmosphere in the oceans Question 5 Methane is a hydrocarbon. True False Question 6 About 1/4 of all global anthropogenic emissions of carbon dioxide into the atmosphere ends up being absorbed by the oceans. True False

Question 7 Greenhouse gas emissions in the southern hemisphere account for most of the excess CO2 in our atmosphere. True False Question 8 Most of the excess (anthropogenic) CO2 in the atmosphere comes from burning of fossil fuels. True False Question 9 The ice core record shows that CO2 levels in the atmosphere have regularly exceeded 500 ppm over the last 800,000 years. True False Question 10 If CO2 in the atmosphere increases 2ppm for every 10 Gigatons of anthropogenic carbon that is added, what will the abundance of CO2 be 50 years from now (assuming 'business as usual')? 900 ppm 520 ppm 5% 470 ppm

Quiz #4 Question 1 Temperatures in the Arctic region are warming faster than the global average. True False Question 2 Which of these statements best describes the response of Arctic sea ice to global warming? It is getting thicker and expanding It has already disappeared It is both thinning and shrinking It has not undergone any change yet Question 3 The term 'cryosphere' refers to the frozen parts of the Earth. True False Question 4 The Greenland ice sheet is the largest mass of ice in the Northern Hemisphere. True False Question 5 The long-term records for Arctic Sea Ice show that: Arctic Sea Ice is in a state of decline, decreasing in age, thickness, volume and summertime extent. Arctic Sea Ice is showing no long term trends up or down. Arctic Sea Ice has already vanished in the summertime. Arctic Sea Ice is much more extensive than it was 20 years ago. Question 6 The term "ice-albedo feedback" refers to a positive feedback loop in Earth's climate system. True False Question 7 The Greenland ice sheet is so far not showing any response to global warming. True False

Question 8 The oldest ice in the Greenland Ice Cap is more than 800,000 years old. True False Question 9 Multi-year sea ice covering the Arctic Ocean is more than 1,000 years old. True False Question 10 Earth's polar regions have a higher albedo than the global average. True False

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