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21 questions
What gas is released into the atmopshere when fossil fuels are burned?
oxygen
carbon dioxide
nitrogen
argon
Which gas makes up 78% of the atmosphere?
ozone
oxygen
nitrogen
water vapor
Which gas is released into the atmosphere by plants following photosynthesis?
Oxygen
Argon
Carbon dioxide
Nitrogen
What layer protects us from the sun's harmful rays?
protection layer
ozone layer
atmospheric layer
Moving air is called ________
wind
fog
dew
Mountaineers carry _________ cylinders with them, while climbing mountains.
nitrogen
carbon dioxide
oxygen
Air is a mixture of many _________
solids
liquids
gases
___________ present inside the nose helps to prevent dust particles form getting inside our respiratory system.
mucus
fine hair
both
The ___ makes the windmill rotate.
wind
electricity
power
The burning of fuel produces ______
dew
wind
smoke
As we move higher in the atmosphere, the air gets _______
increases
more
rarer
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