A sunscreen with a higher SPF blocks out fewer UV rays

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate

answer; hydrologic cycle;

well, since there is no answer choices, i will give an answer on how it works : )

the two objects are placed together. energy will always be transferred from the hotter object to the cooler object until they are equal. hope this is close to one of the answer choices : )