Some scientists have predicted the global nuclear war on the earth would be followed by a serve nuclear winter with a devastating effect on life on earth.What might be the basis of this prediction?
Some scientists have predicted the global nuclear war on the earth would be followed by a serve nuclear winter with a devastating effect on life on earth.What might be the basis of this prediction?
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Answer the following questions : (e ) Some scientists have predicted that a global nuclear war on the earth would be followed by a severe .nuclear winter. with a devastating effect on life on earth. What might be the basis of this prediction ?
Answer the following question: (a) Long distance radio broadcasts use short wave bands. Why? (b) It is necessary to use satallites for long distance T.V. Transmission. Why? (c) Optical and radio telescope are built on the ground but X-ray astronomy is possible only from satellites orbiting the earth. Why? (d) The small ozone layer on top of the atmosphere is crucial for human survival. Why? (e) If the earth did not have atmosphere, would its average surface temperature be higher or lower than what it is now? (f) Some scientists have predicted that a global nuclear war on the earth would be followed by a severe 'nuclear winter' with a devastating effect on life on earth. What might be the basis of this prediction.
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A : It has been predicted that a global nuclear war on the earth would be followed by a severe 'nuclear winter' with a devastating effect on life on earth. R : The clouds produced by global nuclear war would perhaps cover substantial parts of the sky preventing solar light from reaching many parts of the globe causing winter.
A : It has been predicted that a global nuclear war on the earth would be followed by a severe 'nuclear winter' with a devastating effect on life on earth. R : The clouds produced by global nuclear war would perhaps cover substantial parts of the sky preventing solar light from reaching many parts of the globe causing winter.
A
If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
B
If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
C
If assertion is true statement but Reason is false, then mark (3)
D
If both Assertion and Reason are false statements, then mark (4)
Which of the Following discoveries would force scientists to revise their present theories regarding the origin of life on earth?
Which of the Following discoveries would force scientists to revise their present theories regarding the origin of life on earth?
A
The earth is found to be billion years old, rather than 4.6 billion
B
Polypertides can catalyse replication of small RNA molecules
C
There was a lot of oxygen gas in the atmosphere 4 billion years ago
D
Minerals in lava catalyse formation of polypeptides from amino acids.
Satellite revolving around the earth loses some energy due to collision. What would be the effect on its velocity and distance from the centre of the earth?
Satellite revolving around the earth loses some energy due to collision. What would be the effect on its velocity and distance from the centre of the earth?
A
velocity increases and distance decreases
B
Both velocity and distance increases
C
Both velociy and distance decreases
D
Velocity decreases and distance increases
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Answer the following questions: (a) Long distance radio broadcasts use short-wave bands. Why? (b) It is necessary to use satellites for long distance TV transmission. Why? (c) Optical and radiotelescopes are built on the ground but X-ray astronomy is possible only from satellites orbiting the earth. Why? (d) The small ozone layer on top of the stratosphere is crucial for human survival. Why? (e) If the earth did not have an atmosphere, would its average surface temperature be higher or lower than what it is now? (f) Some scientists have predicted that a global nuclear war on the earth would be followed by a severe ‘nuclear winter’ with a devastating effect on life on earth. What might be the basis of this prediction? Answer the following questions: (a) Long distance radio broadcasts use short-wave bands. Why? (b) It is necessary to use satellites for long distance TV transmission. Why? (c) Optical and radiotelescopes are built on the ground but X-ray astronomy is possible only from satellites orbiting the earth. Why? (d) The small ozone layer on top of the stratosphere is crucial for human survival. Why? (e) If the earth did not have an atmosphere, would its average surface temperature be higher or lower than what it is now? (f) Some scientists have predicted that a global nuclear war on the earth would be followed by a severe ‘nuclear winter’ with a devastating effect on life on earth. What might be the basis of this prediction?
Some scientist have predicted that a global nuclear war on earth would be followed by 'Nuclear winter' . What could cause nulear winter ?
Our atmosphere is getting hotter, more turbulent, and more unpredictable because of the ''boiling and churning'' effect caused by the heat-trapping greenhouse gases within the upper layers of atmosphere. With increase of carbon, methane, or other greenhouse gas levels in the atmosphere, our local weather and global climate is further agitated, heated, and ''boiled''. The green house gases such as water vapour, carbon dioxide methane, nitrous oxied, and ozone are causing great impact on life on earth. Due to global warming, the glaciers are melting, causing sea level rise, coastal submergence and frequent natureal disasters. We have to rethink while taking the development projects and help to protect the existing life forms on the earth before its too late because climate change can exetrminate us. What is the chain of impacts caused due to global warming?
Our atmosphere is getting hotter, more turbulent, and more unpredictable because of the ''boiling and churning'' effect caused by the heat-trapping greenhouse gases within the upper layers of atmosphere. With increase of carbon, methane, or other greenhouse gas levels in the atmosphere, our local weather and global climate is further agitated, heated, and ''boiled''. The green house gases such as water vapour, carbon dioxide methane, nitrous oxied, and ozone are causing great impact on life on earth. Due to global warming, the glaciers are melting, causing sea level rise, coastal submergence and frequent natureal disasters. We have to rethink while taking the development projects and help to protect the existing life forms on the earth before its too late because climate change can exetrminate us. Why is life thereatened on the earth due to global warming?
If the atmosphere suddenly condensed into a solid mass and formed a thin layer on the siuface of the earth,what effect would it have on the time of rotation of the earth about it