why do mountaineers carry oxygen cylinders with them ?
how will you show that air contains water vapour?
hw is the balance of oxygen and carbon dioxide is maintained in the atmosphere?
how does dust particles in air help in causing rain?
Why does a lump of cotton wool shrink in water?
List five activities that are possible due to the presence of air.
how is the oxygen in the atmosphere replaced?
why don't we feel the pressure exerted by atmosthere?
why during an incident of fire, one is advised to wrap a woollen blanket over the burning object ?????????
why do bubbles come out of a lump of soil when it is in water?
what are bad effects of a mobile phone on our body?
Which gas has the highest percentage in Air ?
1) Why do traffic policeman wear masks at crowded crossroads??
2) How do plants and animals maintain the balance of oxygen and CO2 in the air ( or in theatmosphere)???
Air is a mixture and its composition keeps on changing from one place to another.justify your a answer with the help of two examples
why the transparent glass of windows if not wiped off regularly appears hazy
why do mountaineers carry oxygen cylinders with them ?
how will you show that air contains water vapour?
hw is the balance of oxygen and carbon dioxide is maintained in the atmosphere?
how does dust particles in air help in causing rain?
Why does a lump of cotton wool shrink in water?
List five activities that are possible due to the presence of air.
how is the oxygen in the atmosphere replaced?
why don't we feel the pressure exerted by atmosthere?
why during an incident of fire, one is advised to wrap a woollen blanket over the burning object ?????????
why do bubbles come out of a lump of soil when it is in water?
what are bad effects of a mobile phone on our body?
Which gas has the highest percentage in Air ?
1) Why do traffic policeman wear masks at crowded crossroads??
2) How do plants and animals maintain the balance of oxygen and CO2 in the air ( or in theatmosphere)???
Air is a mixture and its composition keeps on changing from one place to another.justify your a answer with the help of two examples
why the transparent glass of windows if not wiped off regularly appears hazy