Science quiz

the rarest most durable and beautiful gems of the precious stone

• obsidian

• limestone

• conglomerate

• slate

Any rock containing together with impurities is called limestone

• true

• false

the most commonly used metal is

• iron

• limestone

• obsidian

the hardest of all known mineral

• iron

• limestone

• obsidian

• Diamond

is made up of rounded pebbles (>2mm) cemented together. They are formed from sediment deposited by fast-flowing rivers or by waves on beaches.

• conglomerate

• limestone

• obsidian

• Diamond

is made up of rounded pebbles (>2mm) cemented together. They are formed from sediment deposited by fast-flowing rivers or by waves on beaches.

• conglomerate

• limestone

• obsidian

• Diamond

is made up of rounded pebbles (>2mm) cemented together. They are formed from sediment deposited by fast-flowing rivers or by waves on beaches.

• conglomerate

• sedimentary

• obsidian

• Diamond

slates

• is a metamorphic rock of sedimentary origin.Has been used as a construction material since the ancient Egyptians.

• is a metamorphic rock consisting of carbonate minerals that recrystallize under the influence of heat, pressure

marble

• is a metamorphic rock of sedimentary origin.Has been used as a construction material since the ancient Egyptians.

• is a metamorphic rock consisting of carbonate minerals that recrystallize under the influence of heat, pressure

pumice

• a very porous, frothlike volcanic glass that has long been used as an abrasive in cleaning, polishing,

• is natural rock or sediment that contains one or more valuable minerals concentrated above background levels, typically containing metals