why is the atmosphere essential for life Related: NCERT Solutions, Natural Resources - Class 9, Science

Question

why is the atmosphere essential for life Related:  NCERT Solutions, Natural Resources - Class 9, Science

Answer

The atmosphere is essential for life because it play an important role  to make Earth livable. It protect us from some of the Sun's dangerous rays that reaching Earth. It traps heat, making Earth a comfortable temperature. And it also provides us  oxygen within our atmosphere that is essential for life.

Answer

Atmosphere :The air that cover protective like a blanket is known as atmosphere .

1)Atmosphere is essential for life :
It is essential for survival of life , oxygen help in respiration and co2 help in photosynthesis .

2)Oxygen help in combustion .
3)It protect from harmful radiation.
4)It help in locomotion of animal.

Answer

(a) Oxygen, which is essential for the survival of all living organisms, is present in the atmosphere. (b) Essential gases that support life on the earth are present in the atmosphere. (c) Water cycle would not have been possible without the atmosphere.

Answer

Introduction:
The atmosphere is a layer of gases that surrounds the Earth, extending up to thousands of kilometers from the surface. It plays a crucial role in supporting and sustaining life on our planet.

1. Protection from Harmful Radiations:
The atmosphere acts as a shield, protecting life on Earth from the harmful ultraviolet (UV) radiation of the sun. The ozone layer present in the atmosphere absorbs most of the UV rays, preventing them from reaching the Earth's surface. These UV rays can cause skin cancer, cataracts, and other health issues. Thus, the atmosphere acts as a protective barrier against these harmful radiations.

2. Regulation of Temperature:
The atmosphere helps in regulating the Earth's temperature through various processes. The greenhouse gases present in the atmosphere trap heat from the sun, preventing it from escaping into space. This phenomenon, known as the greenhouse effect, maintains the Earth's average temperature conducive for life. Without the atmosphere, the temperature extremes would be unbearable, with scorching heat during the day and freezing cold at night.

3. Oxygen for Breathing:
The atmosphere is composed mainly of nitrogen (78%) and oxygen (21%). Oxygen is essential for the survival of most living organisms. It is required for respiration, a process by which organisms obtain energy from food. Plants also release oxygen during photosynthesis, replenishing the atmospheric oxygen levels. Without oxygen in the atmosphere, life as we know it would cease to exist.

4. Carbon Dioxide for Photosynthesis:
Plants utilize carbon dioxide from the atmosphere during photosynthesis to produce glucose and oxygen. Glucose serves as a source of energy for plants, while oxygen is released back into the atmosphere. This oxygen is then used by other organisms for respiration. Thus, the atmosphere provides an abundant supply of carbon dioxide necessary for photosynthesis and the overall functioning of the ecosystem.

5. Atmospheric Pressure:
The atmosphere exerts pressure on the Earth's surface, known as atmospheric pressure. This pressure is crucial for the existence of life, as it enables the presence of liquid water. Atmospheric pressure keeps the water from boiling at lower temperatures, allowing it to exist in a liquid state. This is vital for various biological processes, including the transportation of nutrients within living organisms.

Conclusion:
The atmosphere is essential for life on Earth due to its protective nature, regulation of temperature, provision of oxygen and carbon dioxide, and the maintenance of atmospheric pressure. It creates a suitable environment for the survival and thriving of diverse forms of life.

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