Is the earth not round like a ball but like an orange?

The Earth is actually an oblate spheroid, which means it is mostly spherical but slightly flattened at the poles and bulging at the equator. It is not perfectly round like a ball or an orange.

No. The Earth is not round like an orange, it is round like a ball. The Earth is an oblate spheroid which means it is a sphere that is slightly flattened at the poles and bulges at the equator. The Earth's equatorial diameter is about 43 kilometers (27 miles) greater than its polar diameter.