Identify the statements that best describe the carbon cycle.
A. Carbon is stored only in rocks and is released when we burn them.
B. Carbon is stored in the biosphere, the atmosphere, the hydrosphere, and the geosphere.
C. A carbon source is a process that returns carbon to the environment.
D. Carbon can be used only if large amounts of heat are added to a system.
OE. A carbon sink is a process that stores carbon.
OF. Calcium carbonate is found in sea shells.
G. Plants use carbon in photosynthesis.
OH. We will one day use up all of Earth's carbon
