An earthquake is the shaking and trembling that results the movement of rock beneath earth's surface. earthquakes most commonly occur near tectonic plate boundaries. why is this most likely the case ?

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

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You are attempting to recrystallize a crude product mixture. you add the appropriate amount of hot solvent and are allowing the solution to slowly cool to room temperature. however, at room temperature no crystals have appeared, which of the following methods should be used to induce crystallization? choose all correct answers. a) place the flask in an ice bath. b) swirl the contents of the flask. c) add a small seed crystal of the desired product. d) scratch the inside of the glassware using a stir rod. it can be multiple choices