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.
The Building Blocks of DNA: What Is DNA Made Of? The building blocks of nucleic acids are called nucleotides. There are only four types of nucleotides. This is one of the reasons why nucleic acids seem relatively simple compared to proteins. Each nucleotide has a sugar that forms a ring. Bonded to one part of this sugar is something called a phosphate group.