The misconception that water on Earth should "fall off" due to its round shape is a common misunderstanding about gravity and the way our planet functions. The reason water is not falling off the Earth is due to the force of gravity exerted by our planet.
Gravity is the force that attracts objects with mass towards each other. On Earth, gravity pulls everything towards its center, including water. This gravitational force is what keeps the water on Earth's surface and prevents it from floating off into space.
The shape of the Earth, which is an oblate spheroid (slightly flattened at the poles and bulging at the equator), provides a natural balance for the distribution of water. Gravity pulls water towards the center of the Earth, creating a stable equilibrium where water accumulates in oceans, lakes, rivers, and other bodies of water.
The force of gravity acts in all directions, pulling everything towards the center of the Earth. This gravitational force is strong enough to overcome the tendency of water to disperse into space and keeps it contained within Earth's gravitational field.
It's important to understand that the concept of gravity and the shape of the Earth have been scientifically studied and verified through various observations, experiments, and measurements. The understanding of gravity and Earth's shape is well-established and supported by a vast body of scientific evidence.