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.
We call the elements essential in that the world must be looked at in this way; we use the term elements to show that these are building blocks. In the sections that follow (accessible through the menu at left), each of the 18 Geographic Standards is explored more thoroughly in the context of East Asia's geography.