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    ESS
    Grade-9
    Easy

    Question

    Though greenhouse effect is natural but still today’s climate change has become a serious problem. Why?

    1. Because unexpected changes to the climate system may have accidental outcomes that may cause challenges for societies.

    2. Because humans have modified a natural method and exaggerated changes that might normally happen over millions of years. 

    3. Because once greenhouse gases released into the atmosphere, they remain effective for many years, making it hard to reverse the process.

    4. Because a small increase in greenhouse gas concentration can have a great impact on rise in temperatures.

    Hint:

    Greenhouse effect is a serious problem because human's over emission of greenhouse gases has affected the process

    The correct answer is: Because humans have modified a natural method and exaggerated changes that might normally happen over millions of years.

      Concentration of greenhouse gases has increased in the atmosphere due to human activities and therefore it has exaggerated the process.

      Related Questions to study

      Grade-9
      ESS

      What will happen to the climate, if we stop burning of fossil fuels today?

      1. Earth's normal temperature would continue to increase.
      2. Temperatures would remain to warm, then start to cool down in 100 years or more.
      3. Temperatures would keep on fluctuating but continue to be the same on an average.
      4. Temperatures will not be rising once greenhouse gas concentrations stopped rising.

      What will happen to the climate, if we stop burning of fossil fuels today?

      ESSGrade-9
      1. Earth's normal temperature would continue to increase.
      2. Temperatures would remain to warm, then start to cool down in 100 years or more.
      3. Temperatures would keep on fluctuating but continue to be the same on an average.
      4. Temperatures will not be rising once greenhouse gas concentrations stopped rising.
      Grade-9
      ESS

      The normal temperature of the Earth would have been_____________ if greenhouse gases were not present in the atmosphere.

      1. 33ﹾC less than the current average
      2. 33ﹾC more than the current average
      3. 18ﹾC less than the current average
      4. 15ﹾC less than the current average temperature

      The normal temperature of the Earth would have been_____________ if greenhouse gases were not present in the atmosphere.

      ESSGrade-9
      1. 33ﹾC less than the current average
      2. 33ﹾC more than the current average
      3. 18ﹾC less than the current average
      4. 15ﹾC less than the current average temperature
      Grade-9
      ESS

      Global warming can be under control _____________.

      1. By reducing reforestation and increasing the use of fossil fuel
      2. By increasing deforestation and slowing down the growth of human population

        By increasing deforestation and decreasing efficiency of energy usage  

      3. By increasing deforestation and decreasing efficiency of energy usage
      4. By reducing deforestation and cutting down use of fossil fuel

      Global warming can be under control _____________.

      ESSGrade-9
      1. By reducing reforestation and increasing the use of fossil fuel
      2. By increasing deforestation and slowing down the growth of human population

        By increasing deforestation and decreasing efficiency of energy usage  

      3. By increasing deforestation and decreasing efficiency of energy usage
      4. By reducing deforestation and cutting down use of fossil fuel
      parallel
      Grade-9
      ESS

      Assertion: CO2 is a major greenhouse gas.
      Reason: Increase in CO2 level leads to decrease in Earth’s temperature.

      1. If both assertion and reason are true and reason is the correct explanation of assertion.
      2. Both assertion and reason are true, but reason is not the correct explanation of assertion. 
      3. Assertion is true, but reason is false.
      4. Assertion is false, but reason is true.

      Assertion: CO2 is a major greenhouse gas.
      Reason: Increase in CO2 level leads to decrease in Earth’s temperature.

      ESSGrade-9
      1. If both assertion and reason are true and reason is the correct explanation of assertion.
      2. Both assertion and reason are true, but reason is not the correct explanation of assertion. 
      3. Assertion is true, but reason is false.
      4. Assertion is false, but reason is true.
      Grade-9
      ESS

      Climate model is used to forecast____________.

      1. Local air movement
      2. Coverage of ice on land
      3. Ocean temperature
      4. All of these

      Climate model is used to forecast____________.

      ESSGrade-9
      1. Local air movement
      2. Coverage of ice on land
      3. Ocean temperature
      4. All of these
      Grade-9
      ESS

      Thinning of ozone layer is due to __________.

      1. O2
      2. CFC
      3. BFC
      4. N2O

      Thinning of ozone layer is due to __________.

      ESSGrade-9
      1. O2
      2. CFC
      3. BFC
      4. N2O
      parallel
      Grade-9
      ESS

      Select the incorrect statement.

      1. Greenhouse gases are essential for our existence.
      2. Earth’s atmosphere would be freezing up without greenhouse gases.
      3. Ozone is the very abundant greenhouse gas.
      4. HCFCs are responsible for the depletion of ozone layer.

      Select the incorrect statement.

      ESSGrade-9
      1. Greenhouse gases are essential for our existence.
      2. Earth’s atmosphere would be freezing up without greenhouse gases.
      3. Ozone is the very abundant greenhouse gas.
      4. HCFCs are responsible for the depletion of ozone layer.
      Grade-9
      ESS

      What is the change between the greenhouse effect and global warming?

      1. Greenhouse effect: Heat escapes in space. Greenhouse gases: block escaping heat and enters the earth.
      2. Greenhouse effect: Heat escapes in space. Greenhouse gases: Decreases escaping heat and enters the water.
      3. Both a and b correct.
      4. Both a and b incorrect.

      What is the change between the greenhouse effect and global warming?

      ESSGrade-9
      1. Greenhouse effect: Heat escapes in space. Greenhouse gases: block escaping heat and enters the earth.
      2. Greenhouse effect: Heat escapes in space. Greenhouse gases: Decreases escaping heat and enters the water.
      3. Both a and b correct.
      4. Both a and b incorrect.
      Grade-9
      ESS

      Match the following
      Greenhouse gas
      		 Contribution to greenhouse effect (%)
      1. Carbon dioxide
      		 a. 6%
      2. Nitrous oxide
      		 b. 14%
      3. Methane
      		 c. 20%
      4. Carbon fluorocarbon
      		 d. 60%

      1. 1 – d, 2 -a, 3 – c, 4 – b
      2. 1 -d, 2 -c, 3 -b, 4 -a
      3. 1 -c, 2- b, 3 – d, 4 – a
      4. 1 -d, 2 -a, 3 – b, 4 - c

      Match the following
      Greenhouse gas
      		 Contribution to greenhouse effect (%)
      1. Carbon dioxide
      		 a. 6%
      2. Nitrous oxide
      		 b. 14%
      3. Methane
      		 c. 20%
      4. Carbon fluorocarbon
      		 d. 60%

      ESSGrade-9
      1. 1 – d, 2 -a, 3 – c, 4 – b
      2. 1 -d, 2 -c, 3 -b, 4 -a
      3. 1 -c, 2- b, 3 – d, 4 – a
      4. 1 -d, 2 -a, 3 – b, 4 - c
      parallel
      Grade-9
      ESS

      __________is mainly responsible for greenhouse effect.

      1. Oxygen
      2. Carbon dioxide
      3. Mercury
      4. Carbon monoxide

      __________is mainly responsible for greenhouse effect.

      ESSGrade-9
      1. Oxygen
      2. Carbon dioxide
      3. Mercury
      4. Carbon monoxide
      Grade-9
      ESS

      Greenhouse effect is because of ______________.

      1. Increase of ozone and depletion of CO2
      2. Accumulation of ozone as well as CO2
      3. Accumulation of CO2 and depletion of ozone
      4. Presence of green plants on the planet

      Greenhouse effect is because of ______________.

      ESSGrade-9
      1. Increase of ozone and depletion of CO2
      2. Accumulation of ozone as well as CO2
      3. Accumulation of CO2 and depletion of ozone
      4. Presence of green plants on the planet
      Grade-9
      ESS

      ___________is not a greenhouse gas.

      1. Carbon monoxide
      2. Methane
      3. Nitrous oxide
      4. CFC’s

      ___________is not a greenhouse gas.

      ESSGrade-9
      1. Carbon monoxide
      2. Methane
      3. Nitrous oxide
      4. CFC’s
      parallel
      Grade-9
      ESS

      If global warming continues, the organism that may face a very serious threat is________.

      1. Banana
      2. Cow
      3. Polar bear
      4. Rabbit

      If global warming continues, the organism that may face a very serious threat is________.

      ESSGrade-9
      1. Banana
      2. Cow
      3. Polar bear
      4. Rabbit
      Grade-9
      ESS

      We know that the greenhouse effect is natural, then why today's climate change has become a serious issue?

      1. Because a small increase in greenhouse gas concentration can have a great impact on rise in temperatures.
      2. Because humans have modified a natural method and exaggerated changes that might normally happen over millions of years. 
      3. Because once greenhouse gases release into the atmosphere, they remain effective for many years, making it hard to reverse the process.

      4. Because unexpected changes to the climate system may have accidental outcomes that may cause challenges for societies, such as severe weather, spread of diseases, a decrease in marine life, or changes in ocean circulation patterns.

      We know that the greenhouse effect is natural, then why today's climate change has become a serious issue?

      ESSGrade-9
      1. Because a small increase in greenhouse gas concentration can have a great impact on rise in temperatures.
      2. Because humans have modified a natural method and exaggerated changes that might normally happen over millions of years. 
      3. Because once greenhouse gases release into the atmosphere, they remain effective for many years, making it hard to reverse the process.

      4. Because unexpected changes to the climate system may have accidental outcomes that may cause challenges for societies, such as severe weather, spread of diseases, a decrease in marine life, or changes in ocean circulation patterns.

      Grade-9
      ESS

      What will happen to the climate, if we stop burning fossil fuels today?

      1. Earth's normal temperature would continue to increase.
      2. Temperatures would remain to warm, then start to cool down in 100 years or more.
      3. Temperatures would keep on fluctuating but continue to be the same on an average.
      4. Temperatures will not be rising once greenhouse gas concentrations stopped rising.

      What will happen to the climate, if we stop burning fossil fuels today?

      ESSGrade-9
      1. Earth's normal temperature would continue to increase.
      2. Temperatures would remain to warm, then start to cool down in 100 years or more.
      3. Temperatures would keep on fluctuating but continue to be the same on an average.
      4. Temperatures will not be rising once greenhouse gas concentrations stopped rising.
      parallel

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