Question

what are the significance of atmosphere

Answer 1

Significance of AtmosphereThe atmosphere is aninsulating blanketprotecting the Earth. It softens the intense light and heat of the Sun. ItsOzone layer absorbs the most deleterious wavelengthsof the Sun's ultraviolet rays and thus protects living organisms from extinction.The atmosphere is bound to the earth by gravity. Satellites like the moon, who have very low gravitational power, cannot and do not hold an atmosphere.The earth presents a hospitable environment for life, almost solely because of its atmosphere. Many plants reproduce by pollen carried by winds. Birds can fly only because of the air, and the water cycle of the earth is maintained through the atmosphere.The atmosphere diffuses sunlight as well, giving blue skies and the reds, pinks, oranges, and purples of sunrise and sunset.Density & TemperatureThe atmosphere extends as far as 9600 km above the earth's surface. Thedensityof the atmosphere varies with height. It is maximum at the sea level and decreases rapidly as we go up. the climbers experience problems in breathing due to this decrease in the density of air. They have to carry with them oxygen cylinders to be able to breathe at high altitudes. Thetemperaturealso decreases as we go upwards.Atmospheric PressureThe atmosphere exerts pressure on the earth. This varies from place to place. Some areas experience high pressure and some areas low pressure. Air moves from high pressure to low pressure. Moving air is known aswind.Composition of AtmosphereThe atmosphere is composed mainly ofnitrogen and oxygen, which make up about 99% of clean, dry air. About 78% of the atmosphere's volume is made up of nitrogen, and nearly 21% consists of oxygen. Other gases like carbon dioxide (0.03%), argon (0.93%) and others (0.04%) comprise 1% by volume. Apart from these gases, tiny dust particles are also present in the air.

Answer 2

Answer:

One of the main components of the interdependent physical system is the atmosphere. The atmosphere is a layer of gas that surrounds the planets and other celestial bodies. Earth's atmosphere consists of about 78% nitrogen, 21% oxygen and 1% other gases. These gases exist in layers (troposphere, stratosphere, mesosphere, thermosphere and exosphere) which are defined by unique characteristics such as temperature and pressure. The atmosphere protects the planet from incoming ultraviolet (UV) radiation, keeps it warm with insulation, and protects life on Earth by preventing extreme day and night temperatures. The sun heats layers of the atmosphere, convection, air movements, and weather patterns around the world.

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