What Is an Oxymoron?
2. Liquid Gas
Matter can exist in four forms as far as we know: solid, liquid, gas, and plasma, and it is not uncommon for matter to transform from one form to another. Perhaps the most common example of matter changing from one form to another is water.
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We will often see it as ice (solid), water (liquid), or steam (gas). The term “liquid gas” is an oxymoron because matter can only be one or the other, never both simultaneously. It is often used to describe matter that we will usually experience as a gas that becomes liquid under certain conditions. For example, at very low temperatures, even helium can change to a liquid.
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