Question

why acidic igneous rocks are light coloured and less dense
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Answer 1

Answer:

Formed by sudden Colling with no time to form even tiny crystals. This rapid crystallization produces glass with a random arengment of atoms, therefore, these rocks are slightly less dense.

Answer 2

Answer:

Explanation:

the melting is caused by one of these three or all of the processes: an increase in temperature, a decrease in pressure, or a change in composition. Solidification into rock occurs either below the surface as intrusive rocks or on the surface as extrusive rocks, that's why they are less dense aand less coloured

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