Inside our Earth

________ igneous rocks are formed on the surface of the earth.

• Extrusive

• Intrusive

• Plutonic

• Subvolcanic

The igneous rocks which form within the earth are called ________________.

• Intrusive

• Extrusive

• Sedimentary

• Metamorphic

The study of rocks is called ________________.

• Petrology

• Biology

• Astronomy

• Chemistry

The earth is made up of several ______ layers.

• Concentric

• Parallel

• Horizontal

• Vertical

When the magma solidifies deep inside the earth, _____ rocks are formed.

• Intrusive

• Extrusive

• Sedimentary

• Metamorphic

The metamorphic rocks are formed under the influence of

• High temperature

• High pressure

• None of the above

• Both a and b

Minerals are found in the continental masses

• Silica and alumina

• Silica and magnesium

• Nickel and iron

• Silica and iron

The process of transformation of rocks from one form to the other is called

• Rock metamorphosis

• Rock cycle

• Rock change

• Transfer of rocks

Minerals have a definite / certain

• Physical properties

• Chemical composition

• Both a and b

• None of the above

Which of the following minerals are used for industrial purposes?

• Quartz

• Gypsum

• Talc

• All of the above