Rocks formed when bits and pieces of other rocks are compacted are called sedimentary rocks.

Here's a breakdown:

* Sedimentary rocks are formed from the accumulation and cementation of sediments. These sediments can be:

* Clastic sediments: Fragments of other rocks (like sand, pebbles, or clay)

* Chemical sediments: Minerals that precipitate from water

* Organic sediments: Remains of plants or animals (like shells or coal)

* Compaction: The weight of overlying sediments presses down on the lower layers, squeezing out water and air, causing the sediments to become more tightly packed together.

* Cementation: Dissolved minerals in the water that fills the spaces between the sediments crystallize, gluing the particles together and forming solid rock.

Examples of sedimentary rocks include:

* Sandstone

* Limestone

* Shale

* Conglomerate