A) The tiny grains that make up a rock are called minerals and there are always more than one mineral in a rock.
B) Sandstone is the hardest rock while granite is the softest rock.
C) Rocks break under the effect of sun, wind, water etc. and form humus that makes soil productive.
D) Talc is the softest mineral while diamond is the hardest mineral.
Correct Answer: D
Solution :
Rocks can be made of one or several minerals. Sandstone is not the hardest rock and granite is not the softest rock. Rocks after breaking form soil not humus.
You need to login to perform this action.
You will be redirected in
3 sec
