D. Give reasons for the following.
1. Temperature increases with height in the
stratosphere.
2. The troposphere is also known as the 'weather-
making layer'.
3. The ozone layer is vital for life on the Earth.
4. There is a gradual depletion of the ozone layer.
5. The ionosphere conducts electricity and also
reflects radio waves.
6. Global warming causes the sea levels to rise.
Answers
Answer:
The troposphere is heated from the ground, so temperature decreases with altitude. Because warm air rises and cool air sinks, the troposphere is unstable. In the stratosphere, temperature increases with altitude. The stratosphere contains the ozone layer, which protects the planet from the Sun's harmful UV radiation.
Answer:
1. Temperature in the stratosphere increases with the rising altitude, because the Ozone Layer absorbs the greater part of the Solar ultraviolet radiation. The Ozone Layer is an absorbing agent that protects life on Earth.
2. The troposphere is also known as the weather-making zone, because all physical processes of weather, like wind, clouds, storms, rainfall, mist, fog and hail, occur here.
3. The Ozone Layer is vital for life on the Earth, because it protects us from the harmful ultraviolet radiation of the Sun. Ultraviolet radiation of the Sun can cause Skin Cancer and a lot of diseases in humans. Therefore, Life will not be possible without the presence of Ozone Layer in our atmosphere.
4. Ozone depletion, gradual thinking of Earth's Ozone Layer in the upper atmosphere caused by the release of chemical compounds containing gaseous chlorine or bromine from industry and other human activities. The thinking is most pronounced in the Polar regions, especially over Antarctica.
5. The ions result from the removal of electrons from atmospheric gases by Solar ultraviolet radiation. Extending from about 80 to 300 km (about 50 to 185 miles) in altitude, the ionosphere is an electronically conducting region capable of reflecting radio signals back to Earth.
6. Global warming causes sea level to rise because -
i) Glaciers and ice sheets worldwide are melting and adding water to the ocean.
ii) The volume of the ocean is expanding as the water warms. This shift of liquid water from land to ocean is largely due to groundwater pumping.
Explanation:
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