Question

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1V.
made up of silica and
magnesium
Distinguish between the following.
a. Crust and core
b. Sial and sima
C. Rocks and minerals
d. Intrusive and extrusive rocks
How are rocks and minerals useful to us?
How are metamorphic rocks formed?
How are extrusive and intrusive igneous rocks formed?
Name the main types of rocks with one example of each.
Explain the working of the rock cycle.
Why can't we get direct information about the interior of the earth?​

Answer 1

Answer:

Intrusive rocks are formed when lava solidifies inside the earth like Granite

when lava solidiies outside the earth called extrusive igneous rock like basalt

Rock cycle: when rock transforms from one to another is called rock cycle

Answer 2

Answer:

Extrusive or volcanic rocks:

These rocks are formed when magma breaks through the crust and reaches the surface of the earth (where it is called lava). It cools rapidly and solidifies to form rocks. The common rocks formed in this manner are basalt and obsidian.

Instrusive or plutonic rocks:

These rocks are formed when magma fails to break through the crust and cools slowly under the crust  forming rocks. Because of slow cooling it solidifies into rocks with large grains of crystals. The common eg of rocks formed in this manner are granite and dolerite.

I Hope this will help uh ! :)

Explanation: