Test: Composition & Structure Of Atmosphere - 1 - UPSC MCQ

It is found between 10 and 50 Km above the surface of the earth and acts as a filter.

The exosphere is the uppermost layer of the atmosphere. Together with the ionosphere, it makes up the thermosphere. The exosphere extends to 10,000 km above the Earth's surface. This is the upper limit of our atmosphere. The atmosphere here merges into space in the extremely thin air.

Pressure is an important element of atmosphere.

It is responsible for green house effect.

The remaining trace gases include the greenhouse gases, carbon dioxide, methane, nitrous oxide, water vapour and ozone, so-called because they are involved in the Earth natural greenhouse effect, which keeps the planet warmer than it would be without an atmosphere.

All of these are dust particles, which are also present in the atmosphere.

The heat source for our planet is the sun. Energy from the sun is transferred through space and through the earth's atmosphere to the earth's surface. Since this energy warms the earth's surface and atmosphere, some of it is or becomes heat energy.

The burning of fossil fuels produces around 21.3 billion tons of carbon dioxide (CO₂) per year and it is estimated that natural processes can absorb only half of this amount. Therefore, the net increase of CO₂ per year is around 10.65 billion tons.

The most abundant gas in our atmosphere is Nitrogen. It constitutes about 78% of our atmosphere.

The Earth absorbs more heat. This heat primarily comes from the sun and is a critical factor in determining the Earth's climate and weather patterns. While the Earth does absorb moisture (such as water vapor), gases (including greenhouse gases), and humidity, the most significant factor in terms of energy absorption is heat.