MS-ESS3-5: Teaching Climate Factors

This MS-ESS3-5 activity shifts the focus from memorizing climate causes to asking evidence-based questions about them. The standard names the core practice: students ask questions to clarify what evidence shows about the factors behind past temperature rise. Rather than telling students "CO2 causes warming" or "ice melts," the standard asks them to engage in scientific reasoning: What does the evidence show? Does one factor matter more than another? How do factors interact? This approach treats global temperature rise as a puzzle students solve by interrogating evidence.

To practice this inquiry, students need models that respond to change. When students adjust a variable and observe what happens, they can ask follow-up questions: "What if I adjust this differently? What if I combine two changes?" This hands-on reasoning builds the habit of testing ideas against evidence. The two simulations in this activity give students two different lenses for examining what drives warming.

The greenhouse effect simulation shows students how Earth's energy balance responds to greenhouse gas concentration. Students adjust CO2 levels and watch temperature change. They might ask: "Does doubling CO2 double the warming?" or "What happens if we remove some CO2 from the atmosphere?" The model lets them test each question directly. In this way, the simulation becomes a tool for clarifying what greenhouse gases actually do, grounded in observable model behavior.

The ice-albedo simulation surfaces a second major factor: ice cover and its reflectivity. Students observe how melting ice exposes darker water, which absorbs more sunlight, which warms the planet more, which melts more ice. Students adjust solar input and watch ice extent shrink or grow. They ask: "Is ice melt a cause or a result of warming?" "Does less ice always mean more warming?" The model shows the feedback loop in action, allowing students to probe the mechanism.

Organize the class into two groups. Group A joins the greenhouse effect simulation; Group B starts with the ice-albedo simulation. Each group begins with a prediction: "If I change this variable, I expect temperature to change by about X degrees." They adjust the model, record what actually happens, and then pose a follow-up question based on what they observed. This might be "Does the effect get bigger if I adjust it more?" or "What's the slowest change we can see?" After 15-20 minutes, groups rotate to the other simulation and repeat the process.

In the last 5-10 minutes, bring the class together and ask: "Which factor we tested today is bigger? How do we know? What other factors do you think matter?" This closing conversation treats the simulations as evidence that students have interrogated directly. Students connect their hands-on exploration back to the original question: What caused warming over the past century? By working with both mechanisms, they build intuition for how multiple factors combine.