At the end of a lecture on astronomy, describing how the planets orbit the Sun, a little old lady at the back of the room stood up and said: "What you've told us is all rubbish. The world is really a ...

Students will learn how to categorize matter as either pure substances or mixtures. Students will apply tests, based on physical properties of matter samples, to determine whether a mixture is ...

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As kids, you probably learned that matter — the stuff that makes up us and everything else — can come in three different states: solid, liquid, and gas. In high school or college, more exotic forms of ...

Let’s see if we can figure it out states of matter together. Let’s talk about states of matter. You know your states of matter don’t you? We have solids, liquids and gasses, and plasmas, quark-gluon ...