Do you need a quicker lab for your students to see which salt makes the best handwarmer? I've written one up that you can do in 45 minutes! This product includes teacher instructions, a whole-class data chart, a student lab sheet (with procedures) and an answer key. These items are in WORD format, so they're fully editable.
BONUS: This product includes an EXCEL file that allows you to plug in student data and check their math quickly!
*You do need the following salts: ammonium nitrate, calcium chloride, lithium chloride, sodium chloride, sodium acetate, and sodium carbonate. You'll also need some Styrofoam cups and basic chemistry equipment.