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Lesson Title: Measuring the Greenhouse Effect through Simulation Demo Grade Level: 11-12 Prepared by: Molly Nation Subject Area(s): Marine Science Associated with: Ocean Exploration Summary Students will use a model of the greenhouse effect to understand the role of carbon dioxide in global warming. Learning Objectives: 1. Students will be able to define “The Greenhouse Effect” 2. Students will determine how humans contribute to The Greenhouse Effect through CO2 emissions. 3. Students will connect The Greenhouse Effect to Climate Change and Global Warming. BW: What do you know about Climate Change? Background The Sun powers Earth’s climate, radiating energy, to balance the absorbed incoming energy, the Earth must, radiate the same amount of energy back to space. Much of the thermal radiation emitted by the land and ocean is absorbed by the atmosphere, including clouds, and reradiated back to Earth. This is called the greenhouse effect. Through a physical process, the Earth’s greenhouse effect warms the surface of the planet. Without the natural greenhouse effect, the average temperature at Earth’s surface would be below the freezing point of water. Thus, Earth’s natural greenhouse effect makes life, as we know it possible. However, human activities, primarily the burning of fossil fuels and clearing of forests, have greatly intensified the natural greenhouse effect, causing global warming. The two most abundant gases in the atmosphere, nitrogen (comprising 78% of the dry atmosphere) and oxygen (comprising 21%), exert almost no greenhouse effect. Instead, the greenhouse effect comes from molecules that are more complex and much less common. Water vapor is the most important greenhouse gas, and carbon dioxide (CO2) is the second-most important one. Methane, nitrous oxide, ozone and several other gases present in the atmosphere in small amounts also contribute to the greenhouse effect. (IPCC, 2007) Rev July 2016 Pre-demo Questions: 1. What do you think the Alka-Seltzer is going to do/create? 2. Why must the distances of the heat lamps be the same? 3. Predict what the outcome of the greenhouse effect demo will be. Record your Observations: Time Temperature of Bottle 1 (No Alka-Seltzer) Temperature of Bottle 2 (With Alka-Seltzer) 1 min 2 min 3 min 4 min 5 min 6 min 7 min 8 min 9 min 10 min Post Demo Questions: 1. Compare the internal temperatures of the simulation, which one was greater, why? 2. What types of human activities produce the greenhouse gas, CO2? 3. How could human activities be contributing to Global Warming and Climate Change? 4. You are faced with the difficult task of mitigating Global Warming, what are some solutions to helping reduce the amount of CO2 being emitted into the atmosphere? Explain. Rev July 2016