The earth is surrounded by a layer of gases called __________.
Atmosphere
The level of oxygen in air is _________ ℅.
21
Atmosphere ia divided into ______ layers.
5
__________ layer absorbs ultra violet rays.
Ozone
All weather changes occur in __________.
Troposphere
Meteors found in the sky burn in __________ layer.
Mesosphere
The first stage of water cycle is ________.
Evaporation.
Name the sport.
Paragliding
Name the picture
Helicopter
Name the picture
Parachute
