GED Science TestPhysical ScienceEasy
A chemist is analyzing an unknown substance. They determine that the substance has a definite volume but an indefinite shape, and its particles are close together but can slide past one another. Based on these observations, what is the state of matter of the unknown substance?
- AGas
- BPlasma
- CSolid
- DLiquid
Show answer & explanationAnswer & explanation
Correct answer: D. Liquid
Liquids have a definite volume but take the shape of their container (indefinite shape). Their particles are close but can move past each other, allowing flow.
Why the other options are wrong
- A. Gases have indefinite volume and indefinite shape, with particles far apart and moving randomly.
- B. Plasma is an ionized gas, sharing properties of gases but also conducting electricity, which isn't described here.
- C. Solids have definite volume and definite shape, with particles fixed in position.
States of Matter
The distinct forms that matter takes on, characterized by how particles are arranged and interact.
- Solid: definite shape, definite volume.
- Liquid: indefinite shape, definite volume.
- Gas: indefinite shape, indefinite volume.
- Plasma: ionized gas, indefinite shape/volume, conducts electricity.
Memory trick: Solid's Set, Liquid's Loose, Gas Goes Everywhere.