Josh drank a Mountain Dew, why did his urine look electric lime colored afterwards? How did the circulatory, Digestive and the Excretory systems work together to make this happen?

Ricardo notices that when he plays soccer in the rain, his ball does not seem to go as far after a kick. what is the best scientific question that ricardo could ask about this observation? is soccer better played in the rain or sun? how does rain affect the distance a soccer ball can travel? how does rain affect the speed of a soccer ball? is soccer affected by the rain?