Question

Why the shape of earth is oval type

Answer 1

Because mass is distributed unevenly within the planet. The greater a concentration of mass is, the stronger its gravitational pull, creating bumps around the globe.

Earth's shape also changes over time due to a menagerie of other dynamic factors. Mass shifts around inside the planet, altering those gravitational anomalies. Mountains and valleys emerge and disappear due to plate tectonics. Occasionally meteors crater the surface. And the gravitational pull of the moon and sun not only cause ocean and atmospheric tides but earth tides as well.

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