Clouds and precipitation form in
Mesosphere
Thermosphere
Ionosphere
Troposphere
__________ extends several hundred kilometres upwards,from the Earth's surface.
Lithosphere
Atmosphere
Hydrosphere
Biosphere
___________ layer reflects the radio waves back to the surface of the Earth.
Stratosphere
Which is the coldest layer in the atmosphere?
Exosphere
The Earth on which we live has _____ spheres.
Two
Three
Eight
Nine
___________ holds about 90% of all the ozone,which protect us from harmful ultraviolet sun rays.
The layer lying above the troposphere is called
Which layer is warm near the surface of Earth?
The __________ stretches beyond the atmosphere to about 50 km,above the Earth's surface.
The ________ is a mixture of several gases.
