Question

5. Obsidian
B. Very short answer questions
I. Give two examples of the following.
1. Minerals used as building materials
2. Ores
3. Precious metals
4. Gemstones
5. Fossil fuels​

Answer 1

waste app in the world

Explanation:

it is so boring

Answer 2

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1. Minerals used as buliding materials

Some of the examples of minerals which are used as building materials are Clay and limestone .

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2. Ores

Some of the examples of ores are Barite (BaSO₄) , Bornite (Cu₅FeS₄) , Cassiterite (SnO₂) , Chalcopyrite (CuFeS₂),etc

Ore is a naturally occuring mineral (or) rock which bears a metal.

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3. Precious metals

Some of the examples of precious metals are Gold , Silver , Copper , Palladium and other substances .

Precious metals are naturally occuring metals which have a high economic value and are rare.

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4. Gemstones

Some of the examples of Gemstones are Jades , opals , quartz , topaz , turquoise , zircon , olivion and other .

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5. Fossil fuels

Some of the examples of fossil fuels are , Coal , petroleum , natural gas , oil and others.

Fossil fuels are found in earth's crust . They are made from the decomposed plants and animals.