1. Based on the information from the movie, what can you conclude about the most common chemical compound on earth?
a. It's oxygen
b. It's hydrogen gas
c. It's carbon dioxide
d. It's water
2. What is true of a compound?
a. It does not always retain the properties of the substances that make it up
b. It must have water as one of its components
c. It requires heat energy to make
d. It requires electrical energy to make
