Atmosphere contain……which is necessary for all living things.
a) oxygen
b) calcium
c) magnesium
d) sodium
………also absorbs the dangerous carmic& UV radiation coming from the Sun.
a) atmosphere
b) lithosphere
c) hydrosphere
d) all of these
The earth consists of 4 natural systems. These system include
a) Geosphere
b) biosphere, atmosphere
c) hydrosphere
d) all of these
The atmospheric gases, which are used in …………are called air.
a) respiration
b) photosynthesis
c) both a & b
d) none of these
Without air, we cannot imagine ……on earth.
a) plant
b) animal
c) life
d) pollution
………is absorbed by plants and used in the preparation of their food.
a) CO2
b) NO2
c) SO2
d) CO
