Here's how it works:

* Calcium carbonate (CaCO₃) is the main component of limestone.

* When limestone is heated, it decomposes, releasing carbon dioxide (CO₂) and calcium oxide (CaO).

* This calcium oxide is commonly known as quicklime.

* When quicklime is mixed with water, it forms slaked lime (Ca(OH)₂), which is also called lime.

Therefore, since limestone can be used to produce lime, it was aptly named limestone.