Which layer is warm near the surface of Earth?
Troposphere
Exosphere
Mesosphere
Stratosphere
Aeroplanes fly in ___________ layers.
Ionosphere
None of these
__________ extends several hundred kilometres upwards,from the Earth's surface.
Lithosphere
Atmosphere
Hydrosphere
Biosphere
________ layer contains electrically-charged ions that help in communication.
The Earth on which we live has _____ spheres.
Two
Three
Eight
Nine
__________ contains 75% of the atmosphere's gases and large amounts of water vapour and dust.
Which is the second region of the atmosphere?
Thermosphere
The ________ is a mixture of several gases.
Clouds and precipitation form in
The first layer is called the
