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Worksheetsair around us
Total questions: 8
Worksheet time: 3mins
the gas present in the maximum amount in the air is..................
nitrogen
carbon dioxide
argon
oxygen
the ratio of nitorgen to oxygen in the air is approximately....................
1:4
4:1
1:3
3:1
the gas present in the air that turns lime water milky is .......................
nitrogen
carbon dixode
oxygen
water vapour
the gas released by green plants during photosynthesis is ...................
nitrogen
oxygen
carbon dioxde
argon
the air over industrial cities usually has a higher amount of...................
nitrogen
argon
carbon dioxde
oxygen
aquatic plant and anmials use ........................to respire.
dissolved oxygen
dissolved nitrogen
dissolved water
dissovled carbon dixode
when it rains heavily .earthworm come out of the soil because...................................
they like rain
no food isleft in the soil for them to eat
soil is wet
no air is left in the soil for them to breath
for burig which gas in nessary
argon
oxygen
nitrogen
