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Class V - science: Our Environment
One Word Answer Questions:
Q) Which of the following may be a result of global warming?
    
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Q) Global warming can be reduced by increasing what?
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Q) What is the green house gas?
    
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Q) What pollutant is sewage?
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Q) Which of the following do not interfere with the environment?
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Q) Addition of harmful substances in the environment is called?
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Q) Name the substance whose accumulation in pelicans of Lake Michigan led to the formation of thin shells of their eggs?
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Q) Animal dung is?
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Q) Pollution is mainly of?
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Q) Glass house is made for plants to produce a?
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Q) The harmful toxic substances that cause pollution are known as?
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Short Answer Questions:
Q) What is the environment?
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Q) What is pollution?
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Q) What is the green house effect?
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Q) Give three measures to check global warming?
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Q) What are the tidal waves?
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Q) Explain briefly about Air Pollution And Water Pollution?
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Q) Explain briefly about Land Pollution And Sound Pollution?
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Q) Explain briefly about Impact of greenhouse effect?
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Long Answer Questions:
Q) Explain about environment
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Q) Explain about pollution?
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Q) Explain the Impacts of greenhouse effect?
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Q) Explain about green house effect?
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Q) What are the measures to check global warming?
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Q) Explain in detail about Air Pollution And Water Pollution?
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Q) Explain in detail about Land Pollution And Sound Pollution?
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Q) Explain in detail about Impact of greenhouse effect?
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Pollution:-

Environment:-

  • All these living and non-living things around us form environment.
  • Air, Water, land, plant & animals.

Pollution:-

  • Addition of harmful substance in the environment is called pollution.
  • Harmful toxic substances that causes pollution are known as pollutants.
  • Air Pollution,Land Pollution ,Sound Pollution,Water Pollution.
Air Pollution And Water Pollution
airpollution waterpollution
Land Pollution And Sound Pollution
landpollution waterpollution

Green house Effect

A glass house constructed to keep delicate and rare plants that require warmth and protection from weather.

  • House is constructed by panels of glass.
  • Glass panels allows sunrays and heat to pass through the glass house.
  • The heat that enters the glass house cannot escape out.
  • This makes the glass house warmer than the outside environment.
  • This process is called greenhouse effect.
  • Our earth atmosphere also acts as a green house.
  • Layers of carbon-dioxide around the earth.
  • Rays from the sun fall on the earth causing it to get heated.
  • The hot earth sends back the heat.
  • The layer of carbon-dioxide traps this heat energy.
  • This keeps the atmosphere warm.
  • The heating of the earth's atmosphere due to the tropping of heat energy reflected from the earth's surface by carbon-dioxide and other gases in the atmosphere is called greenhouse effect.
greenhouse

Impact of greenhouse effect:

  • Increasing greenhouse effect, the temperature around the world is increasing. Called global warming.
  • Scientists expect the temperature to increase by 30c to 40c dummy next 100 years because of human activities.
  • Melting of glaciers- and ice will take place at a faster rate as a result of global warming.
  • This will raise the sea level leading to floods in low lying areas.
greenhouseeffects

Measures to check global warming

  • Reduction in the use of fossil fuels.
  • Developing renewable sources of energy like solar energy, wind energy etc.
  • Increase in forest area to utilize carbon-dioxide by plants during photosynthesis.
  • Global warming may cause serious damages to the environment and affects human lives.
  • Its high time serious steps to be taken to control the phenomenon of global warming.
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