Fill in the blanks.
(a) A leap year has ___________ number of days.
(b) The daily motion of the earth is _______________.
(c) The earth travels around the sun in _________ orbit.
(d) The sun’s rays fall vertically on the Tropic of ___________ on 21st June.
(e) Days are shorter during ___________ season.
(a) A leap year has 366 number of days.
A year which has 366 days and not 
days is called a leap year.
(b) The daily motion of the earth is rotation.
Rotation can be defined as the movement of the earth on its axis in 24 hours.
(c) The earth travels around the sun in an elliptical orbit.
The shape of the earth’s orbit is not round but elliptical. The earth travels around the sun in an elliptical orbit.
(d) The sun’s rays fall vertically on the Tropic of Cancer on 21st June.
21st June is the longest day, also known as the Summer Solstice. On this day the sun’s rays fall directly over the Tropic of Cancer.
(e) Days are shorter during winter season.
The days are shorter in winter than in summer, because of the tilt of the earth’s axis.