Quizlet is a great flashcard site that helps you create your own flashcards, and provides you with some great ready-made flashcards as well. As an ESL teacher, I find it to be very useful, especially for students who are not native speakers and do not have anybody at home to help them with their vocabulary.
The atmosphere, the ocean, and the terrestrial biosphere. Carbon can be found in the earths oceanic and continental crust in different types of stones as well as in the soil from the decay of organic matter.
The concepts of carbon reservoirs and fluxes are very important to understand the carbon cycle. Reservoirs are the total amount of carbon that is present in a component of the Earth that participates in the carbon cycle. These reservoirs are conveniently measured in the units of Gigatons of carbon, or GtC, which means a billion tons of carbon. The important reservoirs are: 1  Atmosphere: contains at present 750 GtC.