Why does the Moon have a layer of "powdery soil" on its surface?

Question

Quizplus · Accepted Answer

The layer of "powdery soil" on the Moon's surface is the result of countless tiny impacts by small particles striking the Moon. Over time, these impacts have crushed and ground up the lunar rock, resulting in a fine dust-like substance covering the surface. This process is known as "gardening" and is ongoing due to the continued bombardment of the Moon by small particles.

Why Does the Moon Have a Layer of "Powdery Soil