Question

It is challenging to use observations to describe the shape of Earth because

Answer 1

many of our observations are limited to a relatively small area or specific location on Earth's surface. In order to accurately describe the shape of Earth, we would need observations from various points around the globe. Additionally, the size of Earth makes it difficult for us to observe its shape directly. While we have tools like satellites and GPS that can provide measurements from space, these observations are still limited and may not capture the entirety of Earth's shape. Thus, it is challenging to use observations alone to fully describe the shape of Earth. Instead, scientists rely on a combination of observations, mathematical models, and measurements from various sources to determine Earth's shape.