Anything that isn't a man-made event is a natural phenomenon. Hurricanes, earthquakes, the aurora borealis, volcanic eruptions, floods, avalanches, meteor collisions, lightning strikes and the tidal forces caused by the moon are all natural phenomena. Biological processes and astrophysical occurrences fall under nature's purview.Know More
Earthquakes happen because the Earth is composed of tectonic plates connected by fault lines. When the stresses between these plates grows too large and one of them slips, shockwaves are sent throughout the land and any nearby bodies of water.
Hurricanes form over the ocean when a low pressure area is powered by the heat of condensation. This heat results from water vapor rising up to form clouds, which liberates energy. If there isn't an outlet for the build-up of energy via wind shear, the winds build up. A tropical storm forms when winds are 74 miles per hour or higher.
The aurora borealis results when energetic electrons from the solar wind interact with molecules and atoms in our atmosphere. Earth's magnetic field captures part of the solar wind, and the display of lights comes from the many collisions between the particles. This natural phenomenon usually occurs in regions where the magnetic field poles define aurora ovals.Learn more about Weather & Tides
The term "El Nino" describes unusually warm ocean water temperatures in the Equatorial Pacific region. Relaxed trade winds in the Pacific cause this phenomenon by stalling the upwelling of colder, nutrient-rich water to the surface.Full Answer >
A barometer is a device used for measuring atmospheric pressure, also known as barometric pressure or air pressure. A mercury barometer does this by balancing the weight of mercury contained in a glass tube against the weight of the air in the surrounding atmosphere.Full Answer >
Weather patterns on Earth are driven by the unequal heating of the surface by sunlight. The Sun is the ultimate source of energy that drives wind, rain and storms across the planet. The movement of wind patterns, ocean currents and even the water cycle can all be thought of as global mechanisms for redistributing heat from the Sun.Full Answer >
The velocity of a river is the speed that water travels down the river channel. The gradient or slope of the stream bed, the texture of the stream bed, and the width of the stream bed affect the river's velocity.Full Answer >