Question

attributes of solids
. a solids particles are tightly packed together. imagine a crowd of people with little space between each of them, unable to move freely.
. a solids particles are lined up uniformly. imagine a line of soldiers in a straight line.
. a solids particles vibrate in place. imagine a group of friends in line for a ride, bouncing impatiently but unable to move.
. a solids particles have very little energy.
solids also have a defined shape and size. when you think of a solid, think of a toy block. the block has a specific size and an unchanging shape.
solids have a defined shape and size. what does this mean?
a solids shape changes over time.
a solids shape is unchanging.
a solids shape changes freely.

Explanation:

Solids have a defined shape and size because their particles are tightly - packed and have limited movement. This results in an unchanging shape.

Answer:

A solid's shape is unchanging.