Examlex
In the early 1980s, ____ were invented and computer use increased dramatically.
Substance
A form of matter with a specific chemical composition and distinct properties, distinct from mixtures.
Chemical Sample
A small part or quantity of a chemical substance taken to show the quality or nature of the whole.
Density
Density refers to the mass per unit volume of a substance, indicating how closely packed the particles are within the material.
Liquid
A state of matter characterized by a fixed volume but no fixed shape, allowing it to flow and take the shape of its container.
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