Predictions about changes in BTB What molecules do you think carbon What molecules do you think carbon atoms are in the ethanol before it burns? atoms are in after the ethanol burns? How will matter changes in this system affect CO2 in the air and the color of the Level 4: Ethanol We expect most students at all levels to say that atoms are in BTB? Level 2 or 3: may be blank or Change carbon dioxide. or air. say I don’t know Most students will expect the flame to produce CO2 and therefore predict Question Matter correctly that the BTB will change color to green or yellow. The Predictions about energy What forms of energy do you think are How is that energy changes as the in the ethanol? ethanol burns? What evidence of energy change will you be able to observe? Level 4: Chemical energy We expect most students at all levels Change to mention heat and light energy Level 2 or 3: may be blank or We expect most students at all levels say or describe Level 4 students will describe an to mention heat and light energy. I don’t know some type of energy (e.g., heat energy transformation from Question or kinetic) from the flame or match chemical energy to heat and Energy light. The
The Matter Change Question Predictions about changes in BTB How will matter changes in this system affect CO2 in the air and the color of the BTB? Most students will expect the flame to produce CO2 and therefore predict correctly that the BTB will change color to green or yellow. What molecules do you think carbon atoms are in the ethanol before it burns? Level 4: Ethanol Level 2 or 3: may be blank or say I don’t know or air. What molecules do you think carbon atoms are in after the ethanol burns? We expect most students at all levels to say that atoms are in carbon dioxide. The Energy Change Question Predictions about energy What evidence of energy change will you be able to observe? We expect most students at all levels to mention heat and light energy. What forms of energy do you think are in the ethanol? Level 4: Chemical energy Level 2 or 3: may be blank or say I don’t know or describe some type of energy (e.g., heat or kinetic) from the flame or match How is that energy changes as the ethanol burns? We expect most students at all levels to mention heat and light energy Level 4 students will describe an energy transformation from chemical energy to heat and light.
03_4.1_Assessing_Predictions_Tool_for_Ethanol_Burning.docx