| Questions | Answers |
|---|---|
| a supply of something that is useful | resource |
| matter that is made of only one kind of atom or molecule | substance |
| to put together multiple pieces of information in order to understand something | synthesize |
| a group of parts that work together | system |
| water that has been used and now contains harmful substances | wastewater |
| water in the form of invisible gas | water vapor |