Water

ReadWater has so many different forms that it takes all throughout nature, that we sometimes fail to realize that the microscopic properties of water are not the same as those that we are used to seeing on a macroscopic scale. Water molecules interact with oxygen dissoved at levels of about 10 mg/L to support aquatic life. A 10% depletion would be intolerable to fish, mollusks, amphibians, algae - anything with the ability to absorb oxygen from water rather than air.
ThisFor perspective, that would equate to a Richter Scale drop from 19 to 18 in magnitude of oxygen. Recall the tsunami was started by a 9.2 earthquake. If you would like to learn how I came up with these numbers - howdtside grammer school teaches math and science. Look for a water class there in time for spring.

For those of you taking grammer - each different color is themed - can you identify the theme with the color?