Differentiation Modifications Tips Have the students store their 4.3 Evidence-Based Arguments Tool for Ethanol Burning in the same place as their Expressing Ideas and Questions and Predictions and Planning Tools so they can be easily revisited. Extending the Learning Students can use their investigation tools to collect data on changes in mass and CO2 for other fuels (e.g., candle, butane lighter, can of Sterno, paper, matches or wood). Use cobalt chloride indicator paper to test for the presence of water after ethanol burning. Burn steel wool (which gains mass) to help students conceptualize movement of matter/mass changes.