Earth

Percentage of oxygen in the air | oxygen at high altitudes | Ozone

Percentage of oxygen in air

The percentage of oxygen in the air is 20.95%. It is the second most prevalent gas in the atmosphere. Nitrogen is the most prevalent gas and forms 78.08% of the atmosphere. Rest is other gases mainly Argon (0.9340%) and Carbon dioxide (0.0410%). Oxygen at high altitudes We have often heard from people that as we …

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The four seasons on Earth | Why the Earth has seasons?

Seasons

Many people think Summers occur when the Earth is closer to the Sun. This is not true. In fact, when there are summers in the Northern Hemisphere, the Southern Hemisphere experiences Winter and vice-versa. So what causes the four seasons? Let’s read. The seasons on Earth (or any other planet) occur due to its axial …

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Why is the South pole colder than the North pole?

Why is the South Pole colder than the North Pole?

The South Pole is colder than the North Pole. Why? let’s read. The geographic South Pole lies on the continent of Antarctica while the geographic North Pole lies on the Arctic Ocean. Antarctica is the continent with the highest average elevation (2,500 meters). As we know temperature drops with the increase in elevation, the South …

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Types of rocks | Igneous, Sedimentary, Metamorphic

Sandstone

There are different types of rocks that form the Earth’s crust. On the basis of origin, these rocks can be classified as Igneous rocks Sedimentary rocks Metamorphic rocks Types of rocks Igneous rocks Cooling and solidification of magma (molten material inside the Earth) form the igneous rocks. Igneous rocks have a crystalline structure and a …

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Types of volcanoes | Some infamous volcanic eruptions

Mount Fuji stratovolcano

A volcano is an opening in a planet’s crust through which hot lava, tephra, and gases come out from a magma reservoir. Magma refers to the molten or semi-molten rocks inside a planet’s surface. There are 3 types of volcanoes classified based on activity. Active Dormant Extinct Active volcanoes are those which erupt frequently.Dormant volcanoes …

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Layers of the atmosphere | Troposphere, Stratosphere, Mesosphere, etc.

Layers of atmosphere

Earth’s atmosphere is divided in 5 different layers. These layers are troposphere, stratosphere, mesosphere, thermosphere and exosphere. The layers of atmosphere are basically divided on the basis of temperature variation with altitude. Lets dive deep and learn a few things about each layer. Troposphere It is the lowest and the most dense layer of the …

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Latitude and longitude, temperature variation with latitude

latitude and longitude

Latitude and longitude are used to find the precise location of a point on Earth’s surface. Both latitude and longitude are measured in degrees which are divided into minutes which are further divided into seconds. Latitude Latitude of a point on Earth’s surface is the angle the normal from that point makes with the equatorial …

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