………act as protective shield around earth.
a) Geosphere
b) Atmosphere
c) Hydrosphere
d) Biosphere
The major constituents of atmosphere are…
a) N2
b) O2
c) both a & b
d) none of these
The minor constituents are…………
a) CO2
b) Ar
c) some trace gases
d) all of these
The gases of atmosphere are formed to be maintained near the earth’s surface by its……
a) density
b) pressure
c) gravity
d) temperature
An increase in altitude wills……the density of atmosphere.
a) increase
b) decrease
c) both a & b
d) none of these
The ……of an atmosphere also changes with the increase in altitude.
a) temperature
b) pressure
c) volume
d) both a & b
