Question: what is the definition of a rock

Vincent Monchal answered on 15 Nov 2022:

Great question !
A rock is made of different minerals, it can be igneous (coming from a magma), sedimentary (coming from sand particles) or metamorphic (result of the compression or the heat of the two previous types). There are various rocks for many different stories of evolution on our planet, geologists are trying to understand those stories.