Question

the earths outermost layer is called the .

Explanation:

In the study of Earth's structure (a topic in Natural Science, specifically related to Geography or Geology which falls under Natural Science's subfields), the outermost layer of the Earth is known as the crust. This is a fundamental concept in Earth science where the Earth's layers are categorized, with the crust being the thin, outermost solid layer.

Answer:

crust