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PSC Class 132: Earth – Basic Information

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Earth – Basic Information:

The most abundant gas in the earth atmosphere is nitrogen contributing 78.09% of gases in earth.

Oxygen contributes 20.95% of gases in earth. Oxygen is the most abundant element in the Earth's crust Silicon is the second most abundant element contributes about 28% by mass.

Aluminum is the most abundant metal in earth’s surface.

By mass, Iron is the most common element on Earth, contributing earth’s outer and inner cores.

Hill Sphere is the region which dominates the attraction of satellites.

The total land region of Earth is 148.94 million Square Kilometers (contributes 29.2 percent of earth).

The total Sea region of Earth is 361.13 million Square Kilometers (contributes 70.8 percent of earth). Total Sea Coast length is 3,56,000 km.

Dead Sea is earth's lowest land. Its surface and shores are 408 metres below sea level.

The highest part of earth is Mount Everest (8848 Meter from ground level).

The deepest part of Earth is located in Pacific Ocean and it is Mariana Trench (11,033 meter depth).

Mandarin (Chinese) is the most spoken language around the globe.

Christianity has more followers.

China is the most populated country.

Vatican is the least populated country.

Tokyo is the most populated city.

There are seven continents around the world.

Asia is the largest continent.

Australia is the smallest continent.

Greenland is the biggest island.

Russia is the biggest country.

Canada has most sea coasts.

Indonesia is the world’s largest Archipelago.

Algeria is the biggest African country.

Brazil is the biggest country in South America.

Nigeria is the most populated country in Africa.

The northernmost capital city of world is Reykjavik (Iceland).

The southernmost capital city of world is Wellington - New Zealand. Nile in African continent is the lengthiest river.

Amazon in South America is the biggest river. The country which shares boundary with most countries in the world is China and Russia (both 14).

The age of Earth is believed to be 457 crore years.

Surface Area is 51,00,67,420 square kilometers,

Radius is 6,371 km, Circumference is 40,075 kilometer (equatorial) and 40,008 (meridional),

Mass is 5.97219 × 10^24 kg,

Escape velocity is 11.186 km/s and the Distance from Sun is 149,600,000 km.

The Caspian Sea is the largest enclosed inland body of water on Earth.

Lake Superior is the largest fresh water Lake.

It is located in North America.

Baikal Lake in Russia is the deepest lake in the world.

Hudson Bay is the second largest bay in the world after Bay of Bengal.

The biggest Gulf is Gulf of Mexico.


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