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Which of the following rocks is mostly used as tiles on roof?
Slate is used for roofing. It is formed of many layers.
The lead in pencil is made of
Pencil lead is made of graphite.
Which of the following is NOT correct about diamond?
Diamond is the hardest rock.
Which of the following rocks is hard, rough and reddish?
Sandstone is a reddish, hard, and, rough rock.
Pebbles are the pieces of broken rocks.
The rock that is black in colour and is used as fuel.
Coal is a black smooth rock used as a fuel.
Which of these is/are true about the object given in the figure
Slate is a smooth rock. It is formed as layers. It is black in colour and is used as slate or blackboard for writing.
Which of the following pairs is NOT correct?
Granite is used to build houses whereas diamond is used in Jewellery.
A soft, white rock that is used to write on blackboards is
Chalk is a soft white rock used to write on the blackboard.
Which of the following is NOT a hard rock?
Graphite is a smooth rock.