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density
Definition
Density is how much stuff is in a certain space. For example, a brick is denser than a feather because there is more stuff in the same space.
How can the word be used?
The air is less dense than water.
Different forms of the word
Noun: density (plural: densities).
Adjective: dense.
Verb: to densify.
to make something denser.
Etymology
The word "density" comes from the Latin word densitas, which means "thick" or "closely packed". It was first used in English in the 14th century to refer to the amount of matter in a given volume.
Question
Why is density something which impacts a materials ability to float?