Erosion is the process by which natural forces like wind, water, or ice wear away and transport soil, rock, and other materials. It's essentially the removal of material.

Deposition is the process where these eroded materials are dropped or settled in a new location. It's the building up of material.

Here's an analogy:

* Erosion is like carrying a bag of groceries. You're removing items from the store and transporting them.

* Deposition is like putting the groceries away in your kitchen. You're depositing the items in a new location.

Think of a river:

* The river erodes the banks, carrying away soil and rocks.

* This material is then deposited downstream, forming a delta or building up sandbars.

In short, erosion breaks down and moves material, while deposition builds up and settles material. They are two parts of a continuous cycle that shapes the Earth's surface.