GED Science TestPhysical ScienceEasy
A chemist is analyzing a substance and observes that it has a definite volume but no definite shape, taking the shape of its container. The particles are close together but can move past one another. Which state of matter is being described?
- ASolid
- BGas
- CPlasma
- DLiquid
Show answer & explanationAnswer & explanation
Correct answer: D. Liquid
Liquids are characterized by having a definite volume but an indefinite shape, conforming to their container. Their particles are close but can move past each other.
Why the other options are wrong
- A. Solids have definite shape and volume, with particles in fixed positions.
- B. Gases have indefinite shape and volume, with widely spaced, rapidly moving particles.
- C. Plasma is an ionized gas, found at extremely high temperatures, and has indefinite shape and volume.
Liquid State of Matter
A state of matter characterized by a definite volume but an indefinite shape, taking the shape of its container.
- Particles are close together but can move freely.
- Exhibits fluidity and surface tension.
- Less compressible than gases, more than solids.
Memory trick: Matter's states: solid, liquid, gas, each has its own class.