Which one of the following is used as a fuel for producing electricity in power plants?
coal
iron
copper
aluminium
Which among the following is used as an ornamental rock and for polishing ornaments?
sand stone
shale
conglomerate
lime stone
Which one of the following is a natural non- living substance?
An element
A mineral
A compound
A mixture
Which one of the following can be profitably obtained from metallic minerals called ores?
metals
rocks
elements
compounds
Find out the one which has several names such as crude oil, rock oil, fossil, fuel, black gold and liquid sunlight:
Coal
Petroleum
Copper
Iron
Which one of the following looks almost like black glass?
granite
pumice
obsidian
Which among the following is made up of a mineral called calcite?
limestone
A major portion of the earth's land surface is covered with:
igneous rock
sedimentary rocks
metamorphic rocks
minerals
One of the most valuable minerals stored in the earth:
rock
kerosene
A rock of uneven texture is:
