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Turbidity is defined as the amount of cloudiness in a particular water sample; the cloudiness is caused by the sediment in the sample. Turbidity is related to the amount of light that can pass through the water. It is normally measured using a meter although there are other ways to ascertain the turbidity levels of a sample. The particles measured by a turbidity meter are those that are so small that they will not settle to the bottom if agitated. Subsequently the water can appear turbid.

Trees such as California’s majestic coastal redwoods or the South’s moss-draped live oaks sporting life spans of 3,300 and 300 years, respectively, easily outlive their human admirers. However, very few living things on Earth can rival the ancient, dwarfed and knarled bristle cone pines surviving at timberline in California, Nevada, and Utah for up to 4,700 years.

Trees alter the environment in which we live by moderating climate, improving air quality, conserving water, and harboring wildlife. Climate control is obtained by moderating the effects of sun, wind, and rain. Trees also play an intimate role in many of the world’s mythologies (see trees in mythology ).

Plants grow five-feet tall and have glossy green leaves. Flowers appear in clusters at the ends of branches. Plants of the same species may differ in their toxic or subtoxic compounds content because of genetic or environmental factors. One example of this is the foliage of the common chokecherry.

Plants use blue photons for their quality and red photons for their quantity. The green photons that lie in between have neither the energy nor the numbers, so plants have adapted to absorb fewer of them. Plants which are pot bound may wilt because the roots are strangling each other.