STEM with Cog's 10-minute video, The Slow Carbon Cycle, slooooowly explains that:carbon dioxide is absorbed by ocean water and can form carbonate ions increasing the acidity of oceans;some marine organisms like mollusks, corals, and coccolithophores can make calcium carbonate (CaCO3) shells or skeletons;the CaCO3 in marine shells and skeletons can lithify and become limestone by way of deposition, compaction, and cementation;limestone can break down, releasing the carbon dioxide back into the