The Nitrogen Cycle
The nitrogen cycle is the cycle nitrogen goes through to be able to be used by plants.
When an organism dies it goes through decomposition, releasing nitrogen in the form of ammonium.
When ammonia is released into the soil it cannot be used, so bacteria in the soil turn it into nitrogen nitrates that plants can use. This process is called nitrification. There are also bacteria that convert the nitrates into gas, and that gets released back into the atmosphere.
The Water Cycle
The water cycle is the cycle water goes through to get transported to different areas of the world.
When water gets heated up, it changes from liquid form to gas. This is called evaporation.
When water evaporates it is released into the atmosphere. There the gas will form clouds. This is called condensation.
The clouds formed by condensation will get to heavy and release water back to the Earth, this is called precipitation. It can come in the form of rain, hail, sleet, or snow.
Plants that contain water can also transpire. Transpiration is the process of water leaving a plant in the form of water vapor. This will also condensate and become part of the cycle.
The carbon cycle is the process carbon goes through the environment and cycle through our world.
When an animal eats another organism it absorbs the carbon from that organism. This is called assimilation.
When animals decompose or defecate they release that carbon into the soil.
The ocean also absorbs carbon because it is very soluble. Carbon also gets released, so it is a constant in and out cycle in the ocean.