Background:

A perfectly roasted marshmallow, like the one pictured to the right, takes patience. If it is too far from the heat it will never roast and if it is too close it will end up black and charred. (Image source) The marshmallows in the time-lapse video below were heated on a hot plate with a constant temperature.

Describe the properties of the marshmallows.

1. Before heating? 1 pt

2. After Heating? 1pt

3. What is causing the change? 1 pt

(3 points)