Spandex is a synthetic or man-made fiber manufactured from polyurethane. It is lightweight, highly stretchy and elastic, strong, durable, and non-absorbent to water and oils. First produced in the United States in 1959 by DuPont, it was marketed under the trademarked name Lycra.
We learned from the water cycle that we are using and re-using the same water that has been on earth since the beginning of time. The scary part is that while the water is the same, the amount of clean water has gone down. At some point, if we do not take care of it, we will be left with only contaminated water. The water cycle is important because it ensure the availability of water for all living things. 95% of our world is water but most of it is either frozen or underground and also purifies water ready for re-use.
Evaporation and transpiration are two other critical components of the water cycle because they are the processes that put water into the atmosphere in the first place. We'll explore each more in detail in this lesson, but it's important to keep in mind that the water cycle is not circular, like running around a track.