True or False: Atoms within a solid are in fixed positions, but they vibrate in place.

Responses
A falsefalse
B true

B true

Explanation:
Atoms within a solid are indeed in fixed positions, but they are not completely still. They continuously vibrate or oscillate around their equilibrium positions. This phenomenon is known as thermal motion or atomic vibrations. The amount of vibration depends on the temperature of the solid. At higher temperatures, the atoms vibrate with greater amplitude and frequency, while at lower temperatures, the vibrations are slowed down.