- Silicon is present in the largest amount in terms of percentage by mass in the earth’s crust.
- The earth the atmosphere consists of 21% oxygen and 78 % nitrogen.
- The Earth revolves around the sun in an elliptical orbit. Its speed is greatest when it is closest to the sun.
- The core of the earth is Metallic.
- Atmospheric pressure exerted on earth is due to Gravitational pull of the earth.
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