Consider the following statements : Assertion (A) >: In greenhouse effect, the thick carbon dioxide layer allows sunlight to filter through but prevents heat from being re-radiated in outer space. Reason (R) >: The thick carbon dioxide layer functions lik

examrobotsa's picture

Submitted by examrobotsa on

(IES/)
Consider the following statements :
Assertion (A): In greenhouse effect, the thick carbon dioxide layer allows sunlight to filter through but prevents heat from being re-radiated in outer space.
Reason (R): The thick carbon dioxide layer functions like glass panels of a greenhouse or glass win-dows of a motor car. Of the above two statements:

question_subject: 

Science

question_exam: 

IES

stats: 

0,12,4,12,2,0,2

keywords: 

{'greenhouse effect': [3, 0, 0, 1], 'greenhouse': [0, 0, 0, 1], 'thick carbon dioxide layer': [1, 0, 0, 0], 'thick carbon dioxide layer functions': [1, 0, 0, 0], 'sunlight': [0, 0, 1, 0], 'glass panels': [1, 0, 0, 0], 'heat': [10, 3, 13, 46], 'motor car': [1, 0, 0, 0], 'glass win': [1, 0, 0, 0]}

The correct option is option 1: Both A and R are true and R is the correct explanation of A.

Explanation:

Greenhouse effect refers to the process by which certain gases in the Earth`s atmosphere trap heat, leading to the warming of the Earth`s surface. In this process, the thick carbon dioxide layer allows sunlight to filter through, just like glass panels of a greenhouse or glass windows of a motor car. This is because carbon dioxide and other greenhouse gases are transparent to visible light.

However, when sunlight reaches the Earth`s surface and is absorbed, it is re-radiated as heat in the form of infrared radiation. The thick carbon dioxide layer prevents this heat from being re-radiated into outer space, thus trapping it and contributing to the warming of the Earth`s surface. This is similar to how the glass panels of a greenhouse prevent heat from escaping, resulting in a warmer interior temperature.

In conclusion, both statement A and statement R are true. The thick carbon dioxide layer in the greenhouse effect allows sunlight to filter through but prevents heat from being re-radiated in outer space, just like the glass panels of a greenhouse or glass windows of a motor car.

Practice this on app