The true representation of the shape of the Earth is an oblate spheroid. This means it's not a perfect sphere, but rather a sphere that is slightly flattened at the poles and bulging at the equator.

Here's why:

* Earth's Rotation: The Earth's rotation causes a centrifugal force that pushes outward, leading to a bulging at the equator.

* Gravity: Gravity pulls everything towards the center of the Earth, but the centrifugal force at the equator counteracts this pull slightly, causing the Earth to bulge outward.

While a globe is the closest representation of the Earth's shape, it's important to note that even globes are not perfect. They can't capture the nuances of the Earth's surface, such as mountains, valleys, and oceans.

Here are some other terms used to describe the Earth's shape:

* Geoid: This is a more precise representation of the Earth's shape, taking into account the variations in the Earth's gravitational field.

* Spheroid: This is a general term for a 3-D shape that is similar to a sphere but slightly flattened or elongated.

* Ellipsoid: This is a mathematical model that describes the Earth's shape as an ellipse rotated around its minor axis.

While we often use the term "sphere" to describe the Earth, it's important to remember that it is actually an oblate spheroid to be scientifically accurate.