Students are introduced to the idea that matter is composed of atoms and molecules that are ... as they experiment with and observe the heating and cooling of a solid, liquid, and gas.

Liquid assets are assets that are easily and simply converted to cash. Examples of liquid assets include cash, bonds, and CDs. Assets that lack liquidity require time or effort to trade or sell ...

changing from a solid to a liquid, for example. This basic model is, however, just that: there are many, many more states of matter out there that it doesn’t capture. The next most familiar is ...