The first layer of the atmospere
Troposphere
Stratosphere
Mesosphere
Thermosphere
__________ is important for plants.
Methane
Neon
Argon
Carbon dioxide
Green plants produce__________ during photosynthesis.
Oxygen
Nitrogen
None of these
Both animals and plants need
Air
Ozone
People, plants, animals and insects live in the __________.
Winds that change their direction in different season
Permanent
Seasonal
Local
__________ is an essential element in the life environment.
Water vapour
Ozone layer
Humidity
