The four biogeochemical cycles include the water cycle, the carbon cycle, the phosphorous cycle and the nitrogen cycle. These four cycles involve biology, chemistry and geology and describe the flow of nutrients and waste products on Earth.
The water, or hydrologic, cycle, primarily involves the evaporation of moisture from the ocean and its return to lakes, oceans, waterways and groundwater sources in the form of rain. The carbon and phosphorous cycles primarily involve the flow of nutrients and biological wastes to and from plant, animal and microbiological life. The nitrogen cycle is more complex, as nitrogen is fixated by lightning, ultraviolet radiation and bacteria in some processes and returned to Earth's atmosphere in other processes.Learn More
Tundra fires tend to occur naturally in the area, but climate change may also contribute to the greater intensity of recent phenomena. University of Illinois plant biology professor Feng Sheng Hu claims a dramatic, nonlinear relationship occurs between climate conditions and tundra fires that make dead vegetation more flammable and fire prone.Full Answer >
Abiotic factors are the non-living parts of an ecosystem. The abiotic factors of Antarctica are its low temperatures, small amount of precipitation and polar ice sheet. Abiotic factors work with the biotic, or living, factors to shape the ecosystem.Full Answer >
According to the University of Southern California, the two types of ocean currents are surface currents, also know as surface circulation, and deep water currents also called thermohaline circulation. These currents make up 10 percent and 90 percent of all the water in the ocean respectively.Full Answer >
The Earth is constantly spinning on its axis, allowing sunlight to shine on different areas of the Earth at different times of the day, creating daytime when the Sun hits a specific area. When the Sun is not shining on a specific area of the Earth, it is nighttime. Since the Sun does not hit all of the Earth at the same time, it is daytime in some parts of the world, while it is nighttime in others.Full Answer >