The Great Plains have a continental climate. Over much of their expanse, cold winters and warm summers prevail, with low precipitation and humidity, much wind, and sudden changes in temperature. The major source of moisture is the Gulf of Mexico, and the amount falls off both to the north and west.
Radiometric dating or radioactive dating is a technique used to find materials such as igneous or gas, in which look impurities were selectively incorporated when they formed. The method compares the abundance of a naturally occurring radioactive isotope within the material to the abundance of its decay products, which form at a known constant rate of decay.
We divide the eastern and western with the Prime Meridian so we can measure longitude.
<span>parts of Europe are very polluted because they have a very high population density</span>
