The sky is pale blue in higher altitudes while it is deeper blue in lower altitudes. This is because there is more air molecule closer to earth surface (as a result of higher air pressure) than higher altitudes. The air molecules are responsible for scattering of sunlight hence giving the sky its blue hue. The more the air molecules the more the scattering.
Answer:
Hmmmm....what is the question???
IAMTHEGOAT
C - A typical star i just took the test and it was correct
The answer is 4 is helps you estimate the distance between two places.
Plain - flat or Rolling Land with few changes in elevation