Which state of matter is usually most dense?
Rosa fills a graduated cylinder with 100 milliliters of Liquid X. She fills another graduated cylinder with 100 milliliters of Liquid Y. Then, at the same time and from the same height, she drops a marble into each liquid. The marble hits the bottom of the cylinder containing Liquid Y first.
Which state of matter is the strongest conductor of electricity?
Propane is a fuel often used for cooking food on backyard grills. It is stored in a tank.

Which substance most likely consists of atoms that are able to slide past one another?
Which best explains the statement "It has no definite volume”?
During a thunderstorm, a plasma channel forms between the negatively charged clouds and the positively charged Earth, which creates lightning. When lightning is observed, what has passed through the plasma channel?
View the magnified image of salt.

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