Question

Give reason for the following:-
1. The moon rises 30 to 70 minutes later each day than the previous day.
2. No traveller has ever encountered an abrupt edge while travelling around the earth.

Answer 1

1. The moon moves in its orbit around the earth in the eastern direction by about 12 to 15 degrees every day. This causes the earth to have to rotate a little extra each day to get to the same proximity of the moon as the previous day. Hence, the moon rises 30 to 70 minutes later each day than the previous day.

2. No traveller has ever encountered an abrupt edge while travelling around the earth because the earth is assumed to be spherical in shape that makes it circular without any edges.