Which statements about salt water are true? Check all that apply.

Salt water contains minerals other than salt.

Fresh water is heavier than salt water.

Objects float more easily in oceans than in lakes or rivers.

The temperature of ocean water is affected by the depth of the water.

The temperature of ocean water is affected by the ocean's location.

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.