| Term | Definition |
| gas | matter that has no definite shape or volume |
| habitat | the home of a living thing |
| distance | the length between two places |
| liquid | matter that has a definite volume but not a definite shape |
| observation | using one or more of the senses to identify or learn about an object or event |
| weight | the measure of the pull of gravity between an object and Earth |
| solid | matter that has a definite shape and volume |
| vibration | moving back and forth quickly |
| sound | energy that you hear, can be loud or soft |
| properties | qualities of something, color, size, shape, and texture |