The Earth is round because it is an oblate spheroid, a type of sphere that is slightly flattened at the poles and bulges at the equator. The Earth’s round shape is due to the forces of gravity acting on the planet’s mass.

Gravity is the force that attracts objects towards one another. It is the reason that objects fall towards the ground when we drop them and the reason that the Earth stays in orbit around the sun. Gravity also causes the Earth to bulge at the equator and flatten at the poles.

The Earth’s round shape is also due to the way that the planet rotates on its axis. As the Earth spins, the force of gravity acts on the planet’s mass and causes it to deform slightly, taking on an oblate spheroid shape. The Earth’s round shape is important for many reasons, including its role in the Earth’s tides and its impact on the Earth’s climate.