Calculate the number of calories present in a chocolate chip cookie that contains 16g carbohydrate, 3g protein, and 9g fat.

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.