Geography [3 Mark Question Answer]

Jupiter is not inhabitable due to the following reason :

1. Its surface temperature is very low (-148°C)
2. It has no water and there are tremendous storms on the surface of the Jupiter.
3. The atmosphere of Jupiter is unbreathable, because of the absence of oxygen and the presence of poisonous gases like ammonia, methane, and ethane, etc.

The Sun is a large hot gaseous body. It is 1.3 million times bigger than Earth. The surface temperature of the Sun is about 6000°C. In the core of the Sun, the temperature is estimated to be about 20,000,000°C. Such extremely high temperature is produced by the conversion of hydrogen into helium by the process of fusion. This process releases tremendous amounts of energy and Sim radiates the energy in the form of electromagnetic radiation.

There unique features of the earth are as follows :

1. It is neither too hot nor too cold.
2. It had an atmosphere surrounding it.
3. There is plenty of water on it.

The earth has got a spherical shape, slightly bulging at the equator and flattened at the poles. The spherical shape is confirmed by the arrival of a ship seen first by its mast and later on the ship. The satellite picture of the earth, the shadow of the earth on the moon as circular, and the views of circular horizons from the height, etc. all these prove the spherical shape of the earth.

The earth can be clearly seen spherical in the photographs from the satellite. Other proofs are the sight of the mast of a ship first before the ship appears, varying heights of the poles fired at different places at an interval of 5 km, through the Bedford Level Experiment and the sight of Pole Star at 90° from the North Pole and the view of the earth’s horizon as a circular from higher altitudes.