Question

Chapter :3

Motions
Earth
I Answers to the following
the following questions
briefly a
a What is the angle of inclination
of the Earth's axis with its
orbital
plane?
The angle of înclination of the Earth
axis with its obital platire is
661 / 20


Define
rotation and revolution.
Ratation is the movement of the
on its axis Revolution
is the movement of the Earth
around the sun in a fixed parth
or orbit .​

Answer 1

A year which has 366 days instead of 365 days is called a leap year. The earth takes 365¼ days to revolve around the sun. But we consider a year as consisting of 365 days only and ignore six hours for the sake of convenience. These six hours saved every year are added to make one day (24 hours) in four years. This additional day is added to the month of February every fourth year. Thus, in this year, February has 29 days instead of 28 days and the year itself has 366 days.