it's fairly warm but windy outside. use the concept of wind chill factor to explain why it may be a good idea to wear a jacket

It should be a because the dilation changes the sides but not angles because in all shapes you have a certain degree number to add up to like for example a triangle is always 180 degrees

The northern hemisphere is further away from the sun

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.

It doesn't rotate on it's axis like earth does. instead, it has one hot side thst always faces the sun and one cold side that slways faces away from the sun.