Regular patterns of smooth, rounded waves are called

Wow good question mate

Answer volcanic outgassing;

The earth spins around. one side faces the sun, one side faces space. the side facing the sun, we call daytime. side facing away is cooler and is nighttime. a day on earth is 24 hours, that’s how long it takes the earth to fully rotate one time. hope this !

The highest point of a hill (or mountain) is a single point.
a single point can only be precisely marked with a dot. 
putting on a contour line is impossible  on a single point because the contour line is created after multiple points that have the same hight are marked, and after that, all of those points are connected with a line that creates a closed area. so the highest point, as said above, is a single point, there are no other points with the same height, so the only possible way for it to be marked is with a dot, and there is no possibility for a contour line.