Students will examine energy trends to explore why energy efficiency is an important current area of focus. They will also look at current trends in engineering domestically (demographics). They will use the systems to model different scenarios to alter trends.
Students will open with a discussion of the lightbulb activity…why is it important to conserve energy? Will discuss on an individual level, then go to a global context. Students will watch a clip from “Do the Math” (350.org) where they will see the trend of CO2 levels.
Students must determine ‘which is the better lightbulb?”. In the previous lesson they determined energy efficiency/cost efficiency. In this lesson, the purchase prices of the lightbulbs are introduce and students must answer the same question as well as a follow up question.
“Which lightbulb should I buy?”
“How long will it take before I benefit from energy savings?”
Students must determine “which is the better lightbulb?”. They will analyze the efficiency of different light bulbs by measuring wattage and heat emissions. Cost-efficiency will be introduced with setting up linear equations and analyzing their graphs. Students will collect data (temperature, wattage) to determine energy and cost efficiency of different lightbulbs. They will create and graph linear equations to display, analyze and determine results.
These lessons are focused on the importance of engineering, based on climate trends and the need to focus on energy. The first lesson introduces correlations, and the math concepts continue on to linear fit/trend lines. To make a relevant assessment, students will analyze trends in engineering. Their final activity is a hands-on application relating to solar energy. Students will collect data and determine correlation/whether or not there is a linear representation.