Question

Precipitation occurs when

water molecules in the atmosphere lose kinetic energy and speed up
water molecules in the atmosphere gain kinetic energy
water molecules in the atmosphere speed up and fall
water molecules in the atmosphere slow down and come together

Answer 1

\[KE = \frac{ 1 }{ 2 }mv^{2}\] so this the kinetic energy formula.

Answer 2

so if something is slowing down, kinetic energy is going down.

Answer 3

pretty sure gas molecules are becoming liquid. so they would need to slow down and come together, just my opinion.