Small Group Activity

Multiple Choice

How would you show your work for calculating percent increase in CO2 levels for this graph from the year 2015 to the year 2019? Percent Increase= ((Final Value-Starting Value)/Starting Value) x 100

• % increase= ((412-400)/400) x 100

• % increase= ((400-412)/412) x 100

• % increase= ((2019-2015)/2015) x 100

• Showing work is not necessary

Multiple Choice

How would you show your work for calculating percent increase in CO2 levels for this graph from the year 1960 to the year 2015? Percent Increase= ((Final Value-Starting Value)/Starting Value) x 100

• % increase= ((315-400)/400) x 100

• % increase= ((400-315)/315) x 100

• % increase= ((2015-1960)/1960) x 100

• Showing work is not necessary

Open Ended

Every year there is a high and a low in the CO2 levels in the atmosphere. What is happening in nature to cause these natural variations? Why is there a yearly fluctuation in the levels of CO2 every year?

Open Ended

1. Go to the NOAA website (https://www.esrl.noaa.gov/gmd/ccgg/trends/mlo.html) and look at the most recent carbon dioxide level measured. The highest level of carbon dioxide reached in the last 800,000 years was about 300 ppm. How much higher is the current carbon dioxide level than the previous peak value of 300 ppm? (subtract the difference between the current number and 300 ppm to get your answer)

Multiple Choice

Which of the following is not a step in the carbon cycle?

• CO2 in atmosphere

• Nitrification

• Fossil Carbon

• Photosynthesis

Multiple Choice

Which of the following is not a step in the carbon cycle?

• Respiration

• Human Emissions

• Evaporation

• CO2 dissolved in oceans