Video: Understanding Key Terms

Which of the following states of matter are fluids? [A] Solid [B] Liquid [C] Gas.

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Video Transcript

Which of the following states of matter are fluids? a) Solid, b) liquid, c) gas.

To answer this question, we need to know what a fluid actually is. A fluid is any substance that continuously deforms under shear stress. Or in other words, it flows. And that’s the easiest way to think about it.

So which of the states of matter in our list can flow? Well, solids cannot flow. Liquids can flow. And gases also can flow. Therefore, our final answer is that liquids and gases are states of matter that are fluids.

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