Earth

Was the Mediterranean Sea ever dry?

Water bodies have always made an impact on the life of human beings, and therefore, you see that most of the top cities lie around famous oceans, seas, lakes and rivers that provide these places with water, which is important for daily life activities and […]

Why is glacial ice blue?

Glacial ice appears blue to us because all the colors of the visible spectrum (red, orange, yellow, green, blue, indigo, violet) except blue is absorbed by the ice. This blue color wavelength is transmitted which is responsible to make our eyes see the blue color […]

How much water is on earth?

Water is the most important substance on the earth required by all the living organisms whether human beings, plants or animals. We cannot imagine life on earth without water. 72% of the earth surface is occupied by the water bodies. It approximately 336,000,000,000,000,000,000 gallons which […]

How old is earth?

From different researches and evidences the age of earth is approximately 4.55 billion years. Some of the sedimentary rocks found in North America, Africa, Asia, Greenland and Australia are nearly 3.8 billion years old and gave minerals that are of nearly 4.2 billion years. But […]

How are valleys formed?

Valleys are depressions in the earth’s crust resulting from platonic movement of other natural factors. Depending on the formation and the shape of the depression, valleys are classified into different categories. Geological structures like ravines, canyons, gullies, kloofs and canyons may also be referred as […]

Why does earth rotate?

It is believed that the earth is made up of cloud of gas and dust particles called nebula that collapses under its own gravity and started spinning. When this cloud and dust particle condensed they remained in rotation and the rotation is speeded up when […]

How was the earth formed?

It is believed that the earth was formed nearly 4.6 billion years ago from nebula, a cloud of dust particles and gas. Sun stars and all other planets are formed in a same way. So millions of years ago a hot glowing ball was formed […]

Why is earth round?

It is believed that earth is formed four and a half billion years ago from a huge mass of gas. A force pulls everything with the same power from the centre which is called gravitational force and this force is almost equal at every place […]