Building Materials
The rocks which are formed due to cooling of magma at a relatively shallow depth from the earth's surface are called

Igneous rocks
Plutonic rocks
Volcanic rocks
Hypabyssal rocks

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Building Materials
The thermosetting plastic

Chars at 343°C
At 127°C to 177°C permanently set and further application of heat does not soften it
Becomes rigid when moulded at suitable pressure and temperature
All listed here

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Building Materials
Plastic

All listed here
Is an organic substance
Finished products are rigid and stable at normal temperature
Consists of natural or synthetic binders

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