What happens when ethanol burns? Your ideas Your questions Poster for Lesson 1, Activity 2: Students’ initial ideas about

Powers of Ten Atomic-molecular Microscopic Macroscopic Large Scale To go with Lesson 2: Powers of Ten nanometer micrometer millimeter Meter Kilometer Smaller 10-10 10-9 10-8 10-7 10-6 10-5 10-4 10-3 10-2 10-1 100 101 102 103 104 105 Larger

What happens when soda water loses its fizz? What molecules are carbon atoms in before the change? What other molecules are involved? Where are atoms moving from? What molecules are carbon atoms in after the change? What other molecules are involved? Where are atoms moving to? Chemical change Teaser process tool for soda water Remember: Atoms last forever (so you can rearrange atoms into new molecules, but can’t add or subtract atoms)

Date_______ Class Results for Digital Balance and BTB Class __________ Group Paper Clip Petri dish Cup of BTB Pencil BTB before BTB after 1 2 3 4 5 6 7 8 Average

Date_______ Class Results for Soda Water Class __________ Group Start time End time Initial mass Final mass Change in mass BTB before BTB after Notes 1 2 3 4 5 6 7 8 Average

Chemical change Reactants Products Process Tool for Molecular Models Start by making the molecules and energy units of the reactants and putting them on the reactants side, then rearrange the atoms and energy units to show the products. Chemical change Reactants Products Remember: Atoms last forever (so you can rearrange atoms into new molecules, but can’t add or subtract atoms) Energy lasts forever (so you can change forms of energy, but energy units can’t appear or go away)

What happens when ethanol burns? What forms of energy are in the reactants? What molecules are carbon atoms in before the change? What other molecules are involved? Where are atoms moving from? What forms of energy are in the products? What molecules are carbon atoms in after the change? What other molecules are produced? Where are atoms moving to? Teaser process tool for all investigations except soda water Chemical change Remember: Atoms last forever (so you can rearrange atoms into new molecules, but can’t add or subtract atoms) Energy lasts forever (so you can change forms of energy, but energy units can’t appear or go away)

Date_______ Class Results for Burning Ethanol Class __________ Group Start time End time Initial mass Final mass Change in mass BTB before BTB after Notes 1 2 3 4 5 6 7 8 Average