Earth! Trivia Quiz

Answer: Blue

Earth's surface is mostly covered with water. Around 70% of the Earth's surface is covered by oceans and seas. This is the reason why our planet is also known as the blue planet. The rest of the area is covered by land. The land area is basically the area of all the continents and several island groups.

Answer: Oxygen

The leaves of trees have chlorophyll in them. They use water, sunlight, chlorophyll and carbon dioxide to create their food and release oxygen as a byproduct. This oxygen is then used by many living organisms for respiration. In this process they release carbon dioxide which again is taken in by trees.

This cycle keeps on going and helps in maintaining the balance between carbon dioxide and oxygen.

Answer: Sahara Desert

The Sahara Desert covers a major part of northern Africa. It is the largest desert on Earth. It covers an area of about 9.1 million square kilometres.

Answer: Pacific Ocean

The Pacific Ocean is the largest among all of Earth's oceans. It extends from north to south and is bounded by Asia and Australia in the east and America in the west.

Answer: Mariana Trench

The Mariana Trench is the deepest point on Earth, located in the Pacific Ocean. The depth of this trench is about 11 km. It is extremely difficult to reach the bottom of the trench as the water pressure from above is enormous, but still humans have managed to go there.

Answer: Equator

The equator is the imaginary line that divides the Earth into northern and southern hemispheres. The length of this line is about 40000 kilometres. Countries located on or around the Equator are usually hot all year round.

Answer: Core

The centre of the Earth is known as the core. The core of the Earth is very hot and mainly consists of molten metals such as nickel and iron. The layer just above the core is called the mantle. And the outer most layer is called the crust. Lava (molten rock) inside the Earth is called magma.

Answer: False

Out of 57 million square kilometres of available land area, around 12 million square kilometre of land is arable, which is about just above 20%. This arable area is decreasing every year.

Answer: False

Our atmosphere consists of 78% nitrogen and 21% oxygen. Among the rest, 0.03% is carbon dioxide. Carbon dioxide is a greenhouse gas which helps the Earth to keep itself warm when there is no sunlight.

Answer: 4 billion years

By using various kinds of radioactive dating, geologists have estimated the age of our Earth as around 4 billion years. The age of the moon is also very similar to that of Earth.