Question

C. Why are pumice rocks light in weight?
D. Why does magma exist in molten state under earth's crust?
is slate used in making roof tiles?​

Answer 1

Answer:

C. Pumice is an extrusive volcanic rock. It is usually pale in color and very lightweight. ... When a volcano erupts, gases escape causing fast cooling and depressurization of the surrounding molten lava, filling it with air pockets. This results in a rock so lightweight it often floats!

D. When magma flows or erupts onto Earth's surface, it is called lava. Like solid rock, magma is a mixture of minerals. It also contains small amounts of dissolved gases such as water vapor, carbon dioxide, and sulfur. The high temperatures and pressure under Earth's crust keep magma in its fluid state.

yes

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