The most important layer of the atmosphere.
Troposphere
Stratosphere
Mesosphere
None of these
The layer contains ozone gas
Exosphere
Thermosphere
Biosphere
Which of the following gases protects us from harmful sun rays
Carbon Dioxide
Nitrogen
Ozone
The movement of air from high pressure area to low pressure areas
Wind
Rain
Snow fall
Water fall
____________ is essential for the life of all organisms.
Water vapour
Air
Evaporation
Precipitation
A greenhouse gas.
Carbon dioxide
Hydrogen
Helium
