Social Science Question(1 Marks)

To reach to the centre of the earth we will have to dig a hole 6000km deep on the ocean floor. This is not possible, so we cannot go to the centre of the earth.

When the igneous and sedimentary rocks are subjected to heat and pressure they change into metamorphic rocks.

Any natural mass of mineral matter that makes up the earth’s crust is called a rock.

The three layers of the earth are crust, mantle and core.

It is called the crust.

1. Sandstone.
2. Shale.

The innermost layer of the Earth is called core.

One type of rock changes to another type under certain conditions in s cycle manner. This process of transformation of the rock from one another is known as the rock cycle.

5000 degree.

Basalt.

Yes.

The main mineral constituents of the continental mass are silica and alumina. It is thus called sial (si-silica and al-alumina).

The innermost layer of the earth is the core.

Igneous and sedimentary rocks change into metamorphic rocks under great heat and pressure.

Igneous and sedimentary rocks can change into metamorphic rocks under great heat and pressure. For example, clay changes into slate and limestone into marble.

It is the thinnest of all the layers.

South Africa.

Latin word for sedimentary is sedimentum which means settle down.

Latin word for igneous is Ignis meaning fire.

The radius of the earth is 6371km.

The main mineral constituents of the continental mass are silica and alumina.

They change into metamorphic rocks.

The deepest mine in the world, is in South Africa. It is about 4km deep. In search for oil engineers have dug a hole about 6km deep.

Greek word for metamorphic is metamorphose meaning change of form.

The process of transformation of the rock from one to another is known as rock cycle.

The radius of the core is about 3500km.

Marble is a metamorphic rock that forms when limestone is subjected to great heat and pressure.

The Red Fort is made of red sandstone.

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

The three main types are, igneous, sedimentary, and metamorphic.

Igneous rocks are formed from the cooling and solidification of magma at high temperatures. The magma comes from deep within our Earth.

The crust forms only 1 percent of the volume of the earth, 84 percent consists of the mantle and 15 percent makes the core.

The oceanic crust mainly consists of silica and magnesium. It is therefore called sima (si–silica and ma–magnesium).

Silica and alumina.

The earth’s crust is made up of various types of rocks such as igneous, metamorphic, and sedimentary rocks.

It is made up of different types of rocks.

The uppermost layer of the Earth is called crust.