How do acidic igneous rocks differ from basic igneous rocks?

Distinguish Between

Igneous rocks may be classified as acidic or basic depending on their chemical composition.

Acidic igneous rocks contain more than 65% silica and a low percentage of oxides. They are light in colour and less dense.
Example: Granite.
Basic igneous rocks contain a low percentage of silica and a high percentage of oxides (such as iron and magnesium). They are dark in colour and dense.
Example: Basalt.

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Rock and it's Types

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Chapter 7: Types of Rocks - Answer the questions in one or two paragraphs

Chapter 7 Types of Rocks
Answer the questions in one or two paragraphs | Q 4

Rocks and minerals play a very important role in our lives.
What problems would you face in their absence?

Which rocks are associated with fossil fuels?

State the types of rocks for the formation of which the following process is involved.

Formation of large crystals, coarse texture and slow cooling and compaction.

State the types of rocks for the formation of which the following process is involved.

Accumulation takes place over long periods of time in seas, lakes and streams.

Distinguish between Regional and Contact metamorphism.

Give one word for the following.

The best example of chemically-formed sedimentary rock, which has been formed by the evaporation of water from solution containing minerals.

What is the basis for the classification of rocks?

Statement (1): Sedimentary rocks consist of many layers.

Statement (2): Sedimentary rocks are formed by the sediments deposited at different points of time.

Diamond is an example of _______ rock.

______ refer to rock in Greek.