A carbon sink absorbs carbon dioxide from the atmosphere. The ocean, soil and forests are the world's largest carbon sinks. A carbon source releases carbon dioxide into the atmosphere. Examples of carbon sources include the burning of fossil fuels like gas, coal and oil, deforestation and volcanic eruptions.
the pattern of the ages of rocks of the seafloor support the theory of plate tectonics because it tells us if the tectonic plates at the seafloor are spreading apart in a divergent boundary
