The rock which is made up of molten magma is

1

(a)

igneous

(b)

sedimentary

(c)

metamorphic

Granite is an example of

1

(a)

extrusive igneous rocks

(b)

intrusive igneous rocks

(c)

sedimentary rocks

(d)

igneous rocks

Mantle lies just beneath the

1

(a)

crust

(b)

core

(c)

silica

(d)

None of these

The Deccan plateau is made up of

1

(a)

granite

(b)

clay

(c)

basalt

(d)

Both (a) and (c)

The oceanic crust mainly consists of

1

(a)

Silica and Aluminium

(b)

Silica and Magnesium

(c)

Silica and Ferrous

(d)

None of these

Any natural mass of mineral matter that makes up the ..... is called a rock.

1

(a)

Earth's crust

Igneous and sedimentary rocks can change into ..... rocks.

1

(a)

metamorphic

The Red Fort is made of.........

1

(a)

red sandstone

The Taj Mahal is made of...........

1

(a)

white marble

Minerals are naturally occurring substances which have certain ..... properties and ..... composition.

1

(a)

physical, definite chemical

Rocks are used in medicine

1

(a) False

(b) True

Limestone changes into marble

1

(a) False

(b) True

Core has very high temperature and pressure.

1

(a) False

(b) True

Basalt is a metamorphic rock.

1

(a) True

(b) False

The innermost layer has a radius of about 1500 km

1

(a) True

(b) False

Name the constituents of oceanic crust.

1

(a)

The oceanic crust mainly consists of silica and magnesium, it is therefore called SiMa (Si-Silica and Ma-Magnesium).

What are fossils?

1

(a)

The remains of the dead plants and animals trapped in the layers of rocks are called fossils.

What happens when igneous and sedimentary rocks go under great heat and pressure?

1

(a)

When igneous and sedimentary rocks undergo great heat and pressure they form another type of rocks. That newly formed rocks is known as metamorphic rocks.

What are sediments?

1

(a)

When rocks roll down, crack and hit each other and are broken down into small fragments. These smaller particles are called sediments.

Why primary rocks or basic rocks are called igneous rocks?

1

(a)

Primary rocks or basic rocks are formed from molten magma by cooling and solidification of matter. Therefore, primary rocks are called igneous rocks due to its formation.

What are minerals? How are they useful for mankind?

3

(a)

Differentiate between igneous and metamorphic rocks

3

(a)

Rocks formation is a slow process. How?

3

(a)

Differentiate between rocks and minerals

3

(a)

Differentiate between crust and core

3

(a)

Discuss the various types of rocks in detail.

5

(a)

Explain basic features of the interior of the earth.

5

(a)

See the following objects carefully and answer the questions that follow

(a) Which minerals most commonly used in the above objects?
(b) Identify some more objects made up of different minerals?

5

(a)