……….in the number of plants increase the amount of CO2 in air.
a) decrease
b) increase
c) both a & b
d) none of these
Composition of Atmosphere:-
The atmosphere is the mixture of different types of gases, including…………
a) water vapours
b) dust particles
c) both a & b
d) none of these
…………are the two
main gases of atmosphere.
a) nitrogen
b) oxygen
c) both a & b
d) Neon
The mass of atmosphere is approximately
a) 4.5 to 5x105 metric tones
b) 4.5x105 metric tones
c) 4.5 to 5x105 metric tones
d) 4.5 to 5x1015 metric tones
The density of
atmosphere is …………
a) 0.00013 g/cm3
b) 0.013 g/cm3
c) 0.13 g/cm3
d) 13 g/cm3
