Earthquake data provided courtesy University of Utah. Yellowstone is one of the most seismically active areas in the United States. Approximately 1,000 to 3,000 earthquakes occur each year in the Yellowstone area; most are not felt. They result from the enormous number of faults associated with the volcano.
What are the effects of environmental pressure on natural selection? A: Environmental pressure is another term for natural selection, a process that encourages some genes to survive because they are conducive to the environment while others die. This process slowly causes a distinct species to evolve over time. Continue Reading.
atmospheric pressure - Student Encyclopedia (Ages 11 and up) The atmosphere that surrounds Earth has weight and pushes down on anything below it. The weight of air above a given area on Earthâs surface is called atmospheric pressure. It is an important factor influencing Earthâs weather and climate. Atmospheric pressure can be measured with an instrument called a barometer and thus is also known as barometric pressure.