they come from the sky
Chalk is a form of limestone, a sedimentary rock.
Chalk is a form of limestone, a sedimentary rock.
Chalk is a biochemical sedimentary rock.
sedimentary rock can form rock such as sandstone that the Egyptian pyramids were built of or they can form the chalk that is used to write on the ground or on a black board.
Chalk
Chalk does not belong to a rock group. Chalk is a type of sedimentary rock composed mainly of the mineral calcite.
limestone or could be gypsum Could be chalk. Dip it in vinegar. If it fizzes, it might be a sedimentary carbonate rock like limestone or chalk. There is always a possibility it is another kind of sedimentary rock or possibly an extrusive igneous one. Testing is needed to be sure.
it is a sedimentary rock
A sedimentary rock.
No it is not metamorphic, it is a sedimentary rock.
None of the above. Marble is a metamorphic rock.
No limestone and sandstone are sedimentary rocks. Chalk is not.