Answer Wiki. Sand sharks a/k/a sand tiger, grey nurse and ragged tooth. Their name reportedly comes from their habit of hanging out near the shoreline, trolling the ocean floor where the waves break close to the beach. While they're considered relatively docile and mind their own business, they apparently will attack a human if provoked.
Contemporary energy transitions differ in terms of motivation and objectives, drivers and governance. In a more narrow sense, a sustainable energy transition is the shift by some countries, most notably Germany (German: Energiewende), to decentralised renewable energy, and energy efficiency.
1 Temperature change: Exothermic is an increase in the speed of the molecules (heat). Exothermic is the taking in of energy. 2  Color change: the increase or decrease of potential energy stored in new bonds.  Precipitate formed: increase or decrease of potential energy in new bonds formed.