How is sleet different from hail? Hail falls to the ground as liquid water, and sleet is solid. Hail falls with rain and snow, and sleet only falls with snow. Sleet can happen during thunderstorms, and hail cannot. Sleet pellets are smaller than hail.

Which of the following best describes the purpose of the parathyroid hormone? a. it decreases the blood calcium level and decreases blood phosphorus level. b. it decreases the blood calcium level and increases the blood phosphorus level. c. it increases the blood calcium level and increases blood phosphorus level. d. it increases the blood calcium level and decreases blood phosphorus level.