When the earth is in the summer solstice (Northern Hemisphere), the earth is the farth â¦ est away from the sun. The reason behind seasons is determined on the earth's tilt. If the tilt is toward the sun, it is summer. If the tilt is away from the sun, it is winter.
In chemistry, a symbol is a code for a chemical element.It is usually derived from the name of the element, often in Latin. This is an example of an atomic symbol. The text boxes explain where the numbers are derived from.or example, He is the symbol for helium (English name, not known in ancient Roman times), Pb for lead (plumbum in Latin), W for tungsten (wolfram in German, not known in Roman times). Only the first letter is capitalized.
The Importance of Oxygen. 1  Toxic stress:A constant need for cellular detoxification from chemical exposure. 2  Emotional stress requiring the production of adrenaline and andrenal hormones. 3  Physical trauma that reduces circulation and O2 supply. 4  Infections that use up O2 to combat bacteria, fungi and viruses.