Solid, liquid, gas … and something else? While most of us learn about just three states of matter in elementary school, physicists have discovered several exotic varieties that can exist under ...

Other common examples of soft matter include yogurt, cookie dough, shampoo, toothpaste, silly putty, snot, slime and frosting. These substances aren’t quite solid and aren’t quite liquid ...

Revise the equation for density and try some example questions. Learn how density is different for solids, liquids, gasses and different materials.