1. The polar diameter of the earth is shorter than the equatorial diameter by 43 km.
2. The sun’s heat and light energy reaches the earth by radiations.
3. The North Pole of the Earth is turned away from the sun on 21st December.
4. At the core of the earth, the temperature is estimated to be around 2,000-degree C.
5. The central core layer of the earth is believed to have the heaviest mineral materials of highest density.

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