The internal structures

1.Geology

The study about the earth

2. Geomorphology

The study of the nature, origin and development of landforms.

3. Paleontology

The study about fossils

4. Orogeny

The birth and formation of the mountain ranges

5. Topography

The region of the current terrain features of a region

6. Petrology

The study about rocks

Indirect ways:

By studying the behavior of the seismic waves (vibration due to earthquakes).

Outer(liquid), Inner(solid)

By examining the rock samples that volcanoes bring out

By studying the meteorites that fall to the ground from the outer space.

LAYERS OF THE EARTH-

-Accourding to composition and physical properties.

Crust-it is very compared to the other layers.

-It is compoyof major and minor blocks of rocks known as tectonic plates.

Continental Crust-it is rich in element K, Na, AI, and Si. It is granitic.

Oceanic Crust-it is rich in elements Fe, Si, and Mg.

Lithosphere- the crust and the upper most part of mantle.

-It is a rocky layer that behaves like a little, rigid solid and breaks under stress.

-It has cooler temperature compared to other parts.

MANTLE

-It is the thickness layer of the earth.it is made up of ferro-magnesium silicate rocks.

-It is temperature increases as you go deeper (1000-3700) degree Celsius

ASTHENOSPHERE – It contains thick magma and has a temperature that is higher that lithosphere.

It is the layer that has the capacity to flow like a fluid and can deform and reshape.

OUTER CORE- It is made up molten iron and nickel

INNER CORE- It is made up to iron.

OUTER CORE- It is the only layer of the earth that is liquid.

INNER CORE- It is composed mostly of solid iron; with great pressure and temperature, the metals are squeezed and cannot move.

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