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Jan 9, 2024

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The Atmosphere and You Lab Report Instructions: Record your observations in the lab report below. You will submit your completed report. Name and Title Include your name, instructor's name, date, and name of lab. alonso crespo Mrs. Henkel 12/22/2023 Objective(s) In your own words, what was the purpose of the lab? Hypothesis In this section, please include the if/then statements you developed during your lab activity. These statements reflect your predicted outcomes for the experiment. If carbon emissions increase by 0.2 gigatons, then the temperature is expected to rise by a certain amount. If carbon emissions decrease by 0.2 gigatons, then the temperature is expected to decrease by a certain amount. Procedure 1. Complete your hypothesis (above). 2. Identify the independent (test) variable and the dependent (outcome) variable: __________________________ 3. Practice using the computer model. Select each marker to see what it does. Here is a summary you can refer back to as you complete your experiment. o Carbon Dioxide Emissions Slider: You will use the arrows to change the amounts of carbon emissions. o Time Step Size: This will allow you to view the data every 5 years or every 10 years. o Start Over: Use this to reset the model if needed.

4. The current carbon emissions are 9.8 gigatons, or 9.8 billion tons. Complete all three scenarios to find out what happens to the global temperature if these emissions stay the same, decrease, or increase over the next century. Follow the instructions in the Data section of this report. Data For each scenario, record the carbon dioxide emission rate and the global temperature. The data for the years 1960–2010 are already filled out for you. Scenario One: Carbon dioxide emissions stay the same ● Set the carbon dioxide emissions rate to 9.8 gigatons. ● Set the time step size to 10 years. ● Select step forward until you have the data through the year 2110. ● Record the data in the table below. Year Carbon Emissions (gigatons) Temperature (Fahrenheit) 1960 4.2 57.2 1970 5.8 57 1980 6.2 57.4 1990 7.8 57.6 2000 8 58 2010 9.8 58 Maintain carbon dioxide emissions at 9.8 for the rest of scenario one. 2020 9.8 58 2030 9.8 58.5 2040 9.8 58.9 2050 9.8 59.1 2060 9.8 59.5 2070 9.8 59.8 2080 9.8 60 2090 9.8 60.1 2100 9.8 60.5 2110 9.8 60.9 Scenario Two: Carbon dioxide emissions decrease ● Set the carbon dioxide emissions rate to 9.8 gigatons. ● Set the time step size to 10 years. ● Select the step forward button once. ● Decrease the carbon dioxide emissions by 0.2 and press step forward.

● Continue stepping forward once, decreasing the carbon emissions each time, until you reach 2110. ● Record the data in the table below. Year Carbon Emissions (gigatons) Temperature (Fahrenheit) 1960 4.2 57.2 1970 5.8 57 1980 6.2 57.4 1990 7.8 57.6 2000 8 58 2010 9.8 58 Decrease carbon dioxide emissions by 0.2 each step forward for the rest of scenario two. 2020 9.6 58 2030 9.4 58.5 2040 9.2 58.9 2050 9 59.1 2060 8.8 59.5 2070 8.6 59.8 2080 8.4 60 2090 8.2 60.1 2100 8 60.5 2110 8.8 60.9 Scenario Three: Carbon dioxide emissions increase ● Set the carbon dioxide emissions rate to 9.8 gigatons. ● Set the time step size to 10 years. ● Select the step forward button once. ● Increase the carbon dioxide emissions by 0.2 and press step forward. ● Continue stepping forward once, increasing the carbon emissions each time, until you reach 2110. ● Record the data in the table below. Year Carbon Emissions (gigatons) Temperature (Fahrenheit) 1960 4.2 57.2 1970 5.8 57 1980 6.2 57.4 1990 7.8 57.6 2000 8 58 2010 9.8 58 Increase carbon dioxide emissions by 0.2 for each step forward for the rest of scenario three. 2020 9.8 58 2030 9.6 58.5

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2040 9.8 58.9 2050 10 59.1 2060 10.2 59.5 2070 10.4 59.8 2080 10.6 60 2090 10.8 60.1 2100 11 60.5 2110 60.9 Conclusion Use your data to answer the following questions. Use complete sentences, and be as detailed as possible. 1. Summarize how the carbon emissions affected the atmospheric temperature in each of the three scenarios: o Scenario One: o Scenario Two: o Scenario Three: 2. Was your hypothesis supported by your results or not? Explain how you know. no 3. Explain the difference between the greenhouse effect and global warming.The greenhouse effect is a natural process that warms the Earth's surface by trapping heat in the atmosphere. Global warming refers to the long-term increase in Earth's average surface temperature, largely caused by human activities intensifying the greenhouse effect. 4. Based on your knowledge of how the greenhouse effect works, why does the level of carbon dioxide affect the global temperature?Carbon dioxide acts as a greenhouse gas by trapping heat in the Earth's atmosphere. Increased levels of carbon dioxide, primarily from human activities, intensify the greenhouse effect, leading to a rise in global temperatures. 5. Name three sources of atmospheric carbon dioxide.Burning Fossil Fuels: Combustion of coal, oil, and natural gas for energy. Deforestation: Removal of trees reduces carbon dioxide absorption. Industrial Processes: Cement production and other manufacturing activities release carbon dioxide