Solids, liquids and gases. In a solid like this brick ... The control variable is kept the same during the experiment. As the control variable, in both samples, use the same number of spoonfuls ...

Although the three states of matter are solid, liquid, and gas, not all substances seem to fit perfectly into one of these groups. Take a look at the substance below and see if you can decide whether ...

Students explore the attractions and motion of atoms and molecules as they experiment with and observe the heating and cooling of a solid, liquid, and gas.