With the help of a diagram show how the tilt of the Earth's axis and the revolution causes (i) seasons: (ii) variation in the length of day and night.

Draw self-explanatory diagram of Perihelion and Aphelion.

Earth revolves around the sun on an …………… path.

1. Oval
2. Circular
3. Elliptical
4. Spherical

One Sidereal Day is equal to ……………

1. 12 hours
2. 23 hr 56 minutes 4.09 sec
3. 8 hours
4. 14 hours