Question

How can we say that the earth is round 4th class ?
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Answer 1

Answer:

Since the force of gravity is roughly the same everywhere on the globe, it could be surmised that the Earth must be spherical. ... When a full Moon occurs in the plane of Earth's orbit, the Moon slowly moves through Earth's shadow. Every time that shadow is seen, its edge is round.

Answer 2

Answer:

Seeing the modal of earth