Older oceanic crust, which is more dense than continental crust, has long since been recycled in the process of subduction. Credit: U.S. Geological Survey. Plate tectonics shapes the surface of our planet, but it also runs much deeper: Plate movement is the surface expression of convection in Earth's interior.
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Covalent bonds are the strongest chemical bonds. They are chemical bonds in which electrons are shared between atoms.
Chocolate agar is essentially blood agar that contains lysed red cells and a couple of growth-promoting agents to grow organisms of Hemophilia and Neisseria.
