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.
  Chemical principles are important in modern cell biology because all living cells are made up of chemicals and many chemical processes occur in various living organisms. â¦ Chemistry is the one science in which all the other sciences are based. In biology you learn about living organisms and their composition.