Put about 1/4 teaspoon of salt by itself in the tin can and set over the burner, and assure that…

Put about 1/4 teaspoon of salt by itself in the tin can and set over the burner, and assure that you have good ventilation. (You may generate a little smoke.) DO NOT TOUCH THE CAN WHEN IT IS HOT! As soon as you see the first item begin to melt, remove from the heat, using tongs or hot pads. Record your observations in the answer box below –about how long and at which setting it took to melt it.

 

Follow the same instructions above for:

Piece of Chalk –

Piece of plastic –

 

Record your observations for EACH in the answer box below –about how long and at which setting it took to melt it.

Which item melted first? Why do you think that is?