All human beings and other creatures are living in the surface of the earth. The 3rd planet of our Solar System is our Earth. Our Earth is mostly made up of water, hills, mountains and deserts. The Earth is, in fact, not really round. It is called an oblate spheroid meaning it’s slightly flattened on the top and bottom poles. The surface of the Earth rotates over 1000 miles per hour. The diameter of the Earth is 7,926 miles. We live on the outermost layer of the earth, called the crust. This varies in depth between 5 and 75 km.
The Earth is mostly made of silicates, with a tremendous amount of oxygen mixed in. In fact, 47% of the Earth's crust is oxygen. The thickest parts of the crust are under the continents, and the thinnest parts are underneath the oceans.The Earth was formed about 4.6 billion years ago through a process called accretion. The age of the Earth is 4.6 billion years old.
The Earth is mostly made of silicates, with a tremendous amount of oxygen mixed in. In fact, 47% of the Earth's crust is oxygen. The thickest parts of the crust are under the continents, and the thinnest parts are underneath the oceans.The Earth was formed about 4.6 billion years ago through a process called accretion. The age of the Earth is 4.6 billion years old.
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