My son, second grade, is doing states of matter. We were trying to help him label different examples for solid, liquids, and gasses. In his science textbook, it mentions that you can’t see a gas and that steam is a liquid because it’s just water suspended in the air, but on his worksheet, by a different source, has fog and smoke as an example of a gas. I’ve always thought of smoke as a gas on a base level. I understand that there are particles being suspended in the air that you can see, but can someone help the states of matter so I can help my son with his homework.
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Smoke would be an example of a Colloid – one thing suspended in another.
Steam *is* vapourised water. We see the water droplets that form as it cools.
The suggestion that gases are all invisible is nonsense – I can’t even think what they intended to say.
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