Our Earth

Our Earth is one of the nice planets of our solar system. The Earth is the third planet from the sun. It is the only known planet that supports life.

No life is found on any other planet except Earth. The earth was formed millions of years ago. At that time, it was a huge hot ball of rocks and gases. When the Earth was formed there was no life on it.

As year passed, the outer surface of the Earth cooled down because of the rain.

All of us live on the outer surface which is known as the crust. But the Earth is not the same deep inside.

We think that the whole earth is cool. But, it is not so. Only the outer surface of the Earth is cool while it is extremely hot inside. Below the crust is the mantle, which is made up of very hot molten rock. In the centre of the Earth is a hot solid ball of many melted metals. This central part of the Earth is called the core. It is the hottest part of the Earth.

We have heard of volcanoes giving out hot lava and causing great damage. Volcanoes are actually cracks or holes in the crust of the Earth. Molten rock, called magma is sometimes forced out from the mantle of the Earth through these cracks or holes. The magma that flows out is called lava. It is red hot and hardens to form rocks on cooling. This shows how hot the Earth is deep inside.


Shape of the Earth:

We often hear that the Earth is like a round ball. Actually, it is not perfectly round. It is slightly flattened at the top and bottom. It looks like a beautiful blue ball from outer space.

Our Earth

Rotation and Revolution of the Earth

Solar System






Third Grade

From Our Earth to HOME PAGE

New! Comments

Have your say about what you just read! Leave me a comment in the box below.


Recent Articles

  1. Respiratory Volumes and Capacities | Tidal Volume | Dead Space

    Aug 29, 25 05:17 PM

    Respiratory Volumes
    Explain respiratory volumes and capacities: Tidal Volume - Tidal volume is the volume of air inspired or expired in relaxed or resting position. Amount of tidal volume is about 500 m and it consists o…

    Read More

  2. Mechanism of Breathing | Definition of Inspiration and Expiration

    Aug 17, 25 11:41 PM

    Pressure in Lungs
    Breathing is the process which is accomplished in three states that is inspiration expiration and pause . Definition of inspiration - Entry of air into the lungs from outside during breathing is calle…

    Read More

  3. Human Respiratory System | External Nares | Nasal Cavity | Pharynx

    Aug 04, 25 03:14 PM

    Lungs
    Definition of respiration - This is the process of making energy available to organisms and their living cells through enzyme controlled catabolic breakdown of organic molecules. The organic materials…

    Read More

  4. Disorders of Digestive System | Symptoms of Jaundice | Vomiting |

    Jul 16, 25 12:18 PM

    Symptoms of Diarrhoea
    Jaundice- It is a disease that occurs due to Umesh discoloration of the skin due to deposition of bilirubin and biliverdin pigment. Jaundice can be offered according to the different position like pre…

    Read More

  5. Absorption of Digested Products | Absorption of Water | Nephrons

    Jul 09, 25 02:24 PM

    Villus
    Food and water is observed in different parts of the body and is distributed in different cells and tissues. Absorption of food is observed to be observed in the small intestine in the specific type o…

    Read More