Question : The layer of the atmosphere in which Radio Waves are reflacted back is called :
Option 1: ionosphere
Option 2: troposphere
Option 3: stratosphere
Option 4: exosphere
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Correct Answer: ionosphere
Solution : The correct answer is ionosphere.
Ionosphere is responsible for reflection of radio waves back to earth. This layer makes the communication and navigation possible on earth. It extends fro 60 km to 800 km from the earth's crust. It also acts as the boundary between the earth's lower atmosphere and outer exosphere i.e. vacuum. It is also known as Thermosphere because high temperature is observed here because of solar activity.
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Question : A level of the atmosphere which is composed partly of electrons and positive ions is called
Question : What is the maximum water vapour content in the atmosphere?
Question : Which of the following greenhouse gases is most abundant in the atmosphere?
Question : Comprehension:
In the following passage, some words have been deleted. Fill in the blanks with the help of the alternatives given. Select the most appropriate option for each number.
Human activities are changing Earth's natural greenhouse
Question : Comprehension: In the following passage, some words have been deleted. Fill in the blanks with the help of the alternatives given. Select the most appropriate option for each number.
Human activities are changing Earth's natural greenhouse 1.
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