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Atmosphere maintain the temperature of earth because?
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Atmosphere maintain the temperature of earth because?
Role of the Atmosphere in Temperature Regulation
The Earth's atmosphere plays a crucial role in maintaining the planet's temperature through various mechanisms. Here’s how it works:
1. Greenhouse Effect
- The atmosphere contains greenhouse gases like carbon dioxide, methane, and water vapor.
- These gases trap heat from the sun, preventing it from escaping back into space.
- This natural process keeps the Earth's surface warm enough to support life.
2. Insulation
- The atmosphere acts as an insulating layer.
- It helps to moderate temperature fluctuations between day and night.
- Without the atmosphere, daytime temperatures would be exceedingly high, while nighttime temperatures would plummet.
3. Reflection and Absorption
- Different components of the atmosphere reflect and absorb sunlight.
- Clouds and aerosols can reflect sunlight back into space, cooling the Earth.
- Conversely, some gases absorb heat, contributing to warming.
4. Circulation Patterns
- Atmospheric circulation redistributes heat around the planet.
- Warm air rises near the equator, while cooler air sinks at the poles.
- This movement creates wind patterns that help balance temperatures globally.
5. Water Vapor's Role
- Water vapor is a significant greenhouse gas and plays a key role in temperature regulation.
- It also participates in cloud formation, which can either trap heat or reflect sunlight.
- The presence of water bodies influences local climate and temperature.
In conclusion, the atmosphere is essential for maintaining a stable temperature on Earth. Its complex interactions ensure that our planet remains habitable by regulating heat effectively.
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Atmosphere maintain the temperature of earth because?
The atmosphere maintains the Earth's temperature through processes that help regulate heat. Here are the key reasons why the atmosphere plays this crucial role:
1. Greenhouse Effect
  • The atmosphere contains greenhouse gases, such as carbon dioxide, water vapor, methane, and nitrous oxide, which trap heat from the Sun. When sunlight reaches the Earth, some of it is absorbed by the surface and warms it. The Earth then radiates this heat back as infrared radiation.
  • Greenhouse gases absorb and re-emit this infrared radiation, keeping the heat near the surface and preventing it from escaping into space too quickly. This process, known as the greenhouse effect, helps to maintain a stable and warm temperature suitable for life.
2. Insulation
  • The atmosphere acts as a blanket around the Earth. It reduces the rate of heat loss during the night and limits the rapid rise of temperatures during the day. Without the atmosphere, the planet would experience extreme temperature swings between day and night, similar to what happens on the Moon.
3. Distribution of Heat
  • The atmosphere helps distribute heat around the planet through wind and ocean currents. These processes transfer heat from warmer areas near the equator to cooler regions near the poles, moderating the temperature across the globe.
  • The movement of air masses, influenced by the Earth's rotation and the presence of large bodies of water, helps to even out temperature differences and prevent extreme temperature zones.
4. Water Vapor and Clouds
  • Water vapor, an important component of the atmosphere, absorbs heat and contributes to the greenhouse effect. Clouds, formed by water vapor, reflect some incoming solar radiation back into space, which helps to cool the Earth, while also trapping heat to maintain the temperature.
5. Protection from Harmful Radiation
  • The atmosphere, particularly the ozone layer, absorbs and blocks harmful ultraviolet (UV) radiation from the Sun. This protection prevents excessive heating of the Earth's surface and helps to keep temperatures within a habitable range.
In summary, the atmosphere helps maintain Earth's temperature by trapping heat, distributing it around the planet, and providing insulation to prevent extreme temperature changes.
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NCERT TEXTBOOK QUESTIONS SOLVED Q. 1. What are the different ways in which water gets contaminated?Ans. Water gets contaminated in the following ways:(i) Many industries discharge harmful chemicals to rivers and streams.(ii) Water gets contaminated when sewage is disposed off in rivers.(iii) Pesticides, weedicides and other chemicals also dissolve in water and get contaminated.(iv) Breeding of microorganisms makes water polluted. Q. 2. At an individual level, how can you help reduce air pollution?Ans. By this process we can reduce air pollution:(i) We should plant trees to reduce the level of carbon dioxide and air pollution.(ii) By using CNG and unleaded petrol in our vehicle.(iii) By using public transport as far as possible.(iv) By giving general awareness about air pollution to our family and friends. Q . 3. Clear, transparent water is always fit for drinking. Comment.Ans. Clear, transparent water is always fit for drinking. This is not true, because many microorganisms are present in it. So we should clean it by boiling. Q. 4. You are a member of the municipal body of your town. Make a list of measures that would help your town to ensure the supply of clean water to all its residents.Ans. A list of measures that would help our town to ensure the supply of clean water to all its residents–(i) Proper cleaning of water tank.(ii) Chlorine tablets should be made available.(iii) To get clean water in every household, it is necessary that water reaching the houses should be treated. Q. 5. Explain the differences between pure air and polluted air.Ans. Pure air is free from germs and harmful gases. It contains 78% nitrogen, 21% oxygen and small amount of other gases and dust particles.Polluted air contains harmful gases and unwanted substances. Q. 6. Explain circumstances leading to acid rain. How does acid rain affect us?Ans. Some pollutants like sulphur dioxide and nitrogen dioxide react with the water vapour present in the atmosphere to form sulphuric acid and nitric acid. The acid drops down with rain, making the rain acidic. This is called acid rain. Acid rain affects us in many ways.(i) Acid rain corrodes the marble of the monument.(ii) Acid rain damages building and sculptural materials.(iii) Acid rain damages fresh water also.(iv) Acid rain also damages our crops and makes it poisonous.(v) Acid rain damages the leaves of plants. Q. 7. Which of the following is not a greenhouse gas?(

Read the given passages/ poems and answer the questions that follows.The world is now warmer than at almost any time since the end of the last ice age and, on present trends, will continue to reach a record high for the entire period since the dawn of civilization, a study has found.The study published in the journal Science, aims to give a global overview of Earth’s temperatures over the past 11,300 years - a relatively balmy period known as the Holocene that began after the last major ice age ended and encompasses all of recorded human civilization.Their data (compiled by studying such things as ice cores, fossils and ocean sentiment) looked back over a much longer era than previous research, which went back 1,500 years.Scientists say it is further evident that modern-day global warming isn’t natural, but the result of rising carbon dioxide emissions that have rapidly grown since the Industrial Revolution began roughly 250 years ago. Scientists say that if natural factors were still governing the climate, the Northern Hemisphere would probably be destined to freeze over again in several thousand years. Instead, scientists believe the enormous increase in greenhouse gases caused by industrialization will almost certainly prevent that.Shaun Marcott, a geologist at Oregon State University, says “global temperatures are warmer than about 75 percent of anything we’ve seen over the last 11,000 years or so.” The other way to look at that is, 25 percent of the time since the last ice age, it’s been warmer than now.It’s taken just 100 years for the average temperature to change by 1.3 degrees, when it took 5,000 years to do that before. By the end of the century, climate warming models predict an additional increase of 2 to 11.5 degrees, due largely to carbon emissions, the study noted.Q. True or false: Scientist predict the earth will freeze over because of increased greenhouse gases.

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Atmosphere maintain the temperature of earth because?
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