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- 1. Multiple Choice
Moving air is called ________
wind
fog
dew
- 2. Multiple Choice
The envelope of air that surrounds the earth is called ________
atmosphere
hydrosphere
lithosphere
- 3. Multiple Choice
Mountaineers carry _________ cylinders with them, while climbing mountains.
nitrogen
carbon dioxide
oxygen
- 4. Multiple Choice
Air is a mixture of many _________
solids
liquids
gases
- 5. Multiple Choice
___________ gas is necessary for burning
oxygen
nitrogen
carbon dioxide
- 6. Multiple Choice
___________ present inside the nose helps to prevent dust particles form getting inside our respiratory system.
mucus
fine hair
both
- 7. Multiple Choice
__________ gas occupies the major part of composition of air.
nitrogen
oxygen
carbon dioxide
- 8. Multiple Choice
The ___ makes the windmill rotate.
wind
electricity
power
- 9. Multiple Choice
The burning of fuel produces ______
dew
wind
smoke
- 10. Multiple Choice
As we move higher in the atmosphere, the air gets _______
increases
more
rarer
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