One astronomical unit is defined as the distance between earth and the moon.
a. true
b. false

No, this is false!

One astronomical unit is defined as the distance between the Earth and the Sun, not the distance between the Earth and the Moon.

It's used as a unit of measurement especially for distances in the Solar system, since it gives us human an intuitive understanding of the distances.

Master planned communities outside of chicago. note: population density means people living in an area per square mile. chicago, an urban and highly populated area has a much more higher density than a desert, amish community, settlement, or nomadic region.