Walk as fast as you can in a circle around a section of the pool that's about 3 feet deep (the more people, the better the effect). Do about 20 laps, then change direction for 10 laps. The resulting rush of water against your body will feel much like the jets in a whirlpool.
Elements and Compounds. All matter in the natural world is composed of one or more of the 92 fundamental substances called elements. An element is a pure substance that is distinguished from all other matter by the fact that it cannot be created or broken down by ordinary chemical means.
Atoms are the building blocks of matter. They are the smallest particles of an element that still have the elementâs properties. Elements are pure substancesâsuch as nickel, hydrogen, and heliumâthat make up all kinds of matter. All the atoms of a given element are identical in that they have the same number of protons, one of the building blocks of atoms.