The Earth is the third planet in the Solar System. It is the only planet in which animals and plants can survive. The Earth is made up of three different layers, the Crust, Mantle and Core.
The surface of the Earth where life exists is the Crust. It is a thin layer of mountains, plains and oceans. Its thickness varies from place to place. In the deep sea it is around five kms and on land around 35km.
The Earth’s Crust consists of rocks and soil. It is made up of basic elements like oxygen, silicon and aluminum. Under the Crust is the Mantle. Its thickness is around 9,200km and it is made up of rocks.
The rocks contain oxygen, silicon, magnesium and iron. The highest temperature is in the Core, between 4,400 C - 5,000 C. Its thickness is about 3,500km.
Seventy percent of the Earth’s surface is covered with water bodies like oceans, rivers, and seas and 30 percent is covered by land like wet and dry land. The Earth is very beautiful because there are mountains, rivers, oceans, and forests in it. That is why there is life on Earth. Essential substances like air and water support life on Earth. 
Other planets are lifeless because the environment is not suitable for life. Like the other planets the Earth also moves around the Sun in a fixed way that is called the Orbit.
The Earth takes nearly 365 days to complete one Orbit. This is what we count as a year. The Earth also rotates on its axis once every 24 hours, it’s called a day.
Day and night occur due to the rotation of the Earth on its axis.
During this rotation some of the places on Earth face the Sun and other places are hidden from the Sun alternatively.
Along with humans the Earth is home to millions of species such as animal and plants.
We should take care of the Earth as much as we take care of our lives. Taking care of the world is the duty of every human being. We have learnt much about how our attitudes and habits can impact our environment in a negative way and how we can change our attitudes to stop or reduce the world’s ruin and damage.
Now, it’s your responsibility to spread the word and let everyone know how important and vital it is to take care of Mother Nature. The planet Earth thanks you very much!
Sasrutha Nayanathul Dias
Grade 7
Sussex International College