Chemistry / Chem 0021 · Atom · ~20 seconds
Matter Defined
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State
Matter is anything that occupies space and has mass.
Show
Air fits this definition: it inflates a balloon, taking up space, and has measurable mass even though it cannot be seen.
Watch for
Because gases are invisible, students often exclude them from "matter" by instinct; an inflated balloon versus a deflated one visibly shows gas occupies space.
Builds on
- Nothing — this is a starting point.