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 all materials, no matter how simple or complicated the material is. An element is made up of only one type of atom. Compounds are made up of different types of atoms combined together. A lump of copper is made up of only copper atoms. Water particles are made up of hydrogen atoms and oxygen atoms combined together. Scientists call this type of particle a molecule.