Related Questions

The earth's atmosphere is an envelope of gases present upto a height of about __________ kms.
A 10
B 200
C 1000
D 2000
Green house gases blanket/block the infrared radiation from earth's surface to the atmosphere leading to its progressive warming up. Which of the following gases does not exhibit green house effect?
A CO2
B H2
C SO3
D N2
পৃথিবী পৃষ্ঠে একটি ইটের ওজন 81 N. পৃথিবীর অর্ধেক বাসার্ধের সমান উচ্চতায় এবং অর্ধেক বাসার্ধের সমান গভীরতায় ইউটির উপরে পৃথিবীর অভিকর্ষ বলের মান কত হবে?(A brick weighs 81 N on the surface of the earth. What are the earth's gravitational forces act on it at a height of half of the radius of the earth and at a depth of half of the radius of earth, respectively?)
A 36 N and 81 N
B 36 N and 40.5 N
C 36 N and 20.25 N
D 98 and 40.5 N
E 81 N and 81 N
Which one is not a primary greenhouse gases in the Earth's atmosphere?
A Carbon dioxide
B Methane
C Nitrogen
D Ozone
Which of the following gases are mainly responsible for the atmospheric greenhouse effect in the earth's atmosphere?
A Oxygen and nitrogen
B Nitrogen and carbon dioxide
C Ozone and oxygen
D Water vapor and carbon dioxide
Why does the ionosphere of the Earth's atmosphere facilitate radio communication? i. The presence of ozone causes the reflection of radio waves to earth ii. Radio waves have a very long wavelength
A i only
B ii only
C both i & ii
D neither i nor ii
A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth's atmosphere, which absorbs it.
A Hydrogen
B Carbon dioxide
C Ozone
D None of these
Which layer of the earth's atmosphere reflect back the radio waves to the earth's surface ?
A Ionosphere
B Stratosphere
C Mesosphere
D Exosphere
At which height, the gaseous surrounding has covered the Earth's atmosphere?
A 100km
B 150km
C 200km
D 300km
There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth's surface in which human being along with other organisms live is called troposphere. The rate at which air temperature in the troposphere gradually decreases with height is about __________ °C/km.
A 0.05
B 1
C 6.5
D 15

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