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.
Carbon dioxide also increases the atmosphere's ability of hold heat, hence the name greenhouse gas. Carbon can be found in: carbon dioxide, limestone, diamonds, graphite, the ocean floor, the Earth's mantle etc. The carbon cycle is a biogeochemical cycle by which carbon is exchanged, in different forms, on Earth.