Figure 1 is a graph of recent average global temperatures and atmospheric carbon dioxide 2000 to 2020 versus time. 15.10 Average Temperature and CO2 for 2000 through 2020 440 15.00 14.90 14.80 Temperature (degrees Celsius) 14.70 14.60 14.50 430 420 410 400 390 380 370 360 14.40 1999 2001 2003 2005 2007 2009 2011 2013 2015 2017 2019 Years ―Temperature (°C) ―CO2 (ppm) CO2 (ppm)
1.a) Examine Figure 1. This graph has two datasets plotted together for the years 2000 through 2020. The left side of the y-axis shows the global average temperature values (in °C). The right side of the y-axis shows the carbon dioxide concentrations in parts per million (or ppm). Describe how the variables temperature and carbon dioxide change with respect to one another over time?
1.b) Use Figure 1 to determine the global average temperature in 2000, and also in 2020. Record the values. Next, take the difference of the temperatures and record how the average global temperature has changed between 2020 to 2000. Show your work.
Global Average Temperature in 2000: °C
Global Average Temperature in 2020: °C
Temperature change from 2020 to 2000: °C
1.c) Use Figure 1 to determine the carbon dioxide concentration in 2000, and also in 2020. Record the values. Next, take the difference of the CO2 concentrations and record how the average global atmospheric carbon dioxide concentration has changed between 2020 to 2000. Show your work.
Carbon Dioxide Concentration (2000): ppm
Carbon Dioxide Concentration (2020): ppm
Carbon Dioxide Concentration change from 2020 to 2000: ppm
1.d) Using the equations written below, calculate the rate of change of temperature and carbon dioxide concentration in the 20-year time interval. For the rate of change values, use your answers from #2 and #3. For the time variable, use 20 years. Show your work below.
Rate of change in temperature = temperature change (˚C)
time (years)
Rate of change in CO2 = CO2 concentration change (CO2 ppm)
time (years)
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Rate of change in temperature: ________________˚C/year
Rate of change in CO2: ________________ ppm/year
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