Five layers of the atmosphere are troposphere, stratosphere, mesosphere, thermosphere and exosphere.
<u>Explanation:</u>
Troposphere is the lowermost layer of the atmosphere which is found in the 0-12 km range. The temperature of the troposphere ranges from 15°C to 51°C. Aircrafts driven by propellers can access the troposphere only.
Stratosphere is the layer of atmosphere that is second from earth. It is found in the 12-50 km range. Its temperature ranges from -51°C to-15°C. Jet-powered aircraft can access the stratosphere.
Mesosphere is the third atmospheric layer. It is found in the 50-85 km range. Its temperature ranges from -15°C to-120°C. rockets and rocket-powered spacecraft can access the mesosphere.
Thermosphere is the fourth atmospheric layer. It is found in the 500-100 km range. Its temperature ranges to about 2000°C. the International Space Station orbits in the thermosphere.
Exosphere is the topmost atmospheric layer. It extends to 10000 km above earth. Its temperature is greater than 2000°C. most of the satellites that orbit the earth are found in the exosphere.
The density of atmospheric layers decreases while moving up along the layers. Thus troposphere has the maximum density.
‘‘Vitamin D’’ is the answer
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Answer:
How the sea serves us
> Many of the ecosystem services provided by the sea are threatened today by overexploitation, environmental pollution and greenhouse gases. Yet in many cases, how severely individual habitats are degraded and ecosystem services are impaired is just not known. Researchers are therefore attempting to assess the exact condition of marine ecosystems. Such analysis is important in order to plan concrete protection measures and to define critical limits and target values.
The bounty of the sea © Science Photo Library/Steve Gschmeissner/Getty Images
The bounty of the sea
> Since time immemorial we humans have been living with the seas and from their bounty. They provide us with food, mineral resources, transportation routes and other services. The climate-regulating effect of the oceans and the biochemical processes that take place in the sea are of fundamental importance. Today, some of these services are under threat, which i
Double helix is the answer
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<span>Herring gulls fiercely defend the areas around their nests in cliff-top breeding colonies. within the colony, they would show a uniform dispersion pattern.</span>
