Q: Fact 1: Water vapor cooling causes that water vapor to condense. Fact 2: Water is made up of H2O molecules. Given the two facts above, what type of vapor cooling causes that vapor to condense?

Choices:
1). Dew
2). CO 2
3). CFCs
4). rain
5). SO2
6). H20
7). NaCl
8). h2o
The answer is:
8).