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SURA PUBLICATION-AIR -Exercise
- is the active component of air.
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- The constituent of air that supports combustion is .
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- is the percentage of nitrogen in air
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- respire using their skin.
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- was able to identify hightly reactive gas called oxygen.
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- The oxone layer protects all life on earth from the harmfullrays of th...
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- is used in trucks or freight cars for refrigerating perishable items s...
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- Name some extra – ordinary conditions where oxygen is used.
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- Find whether the following sentence are true or false.If false correc...
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- What is a weathercock?
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- Explain about respiration of plants and animals in water.
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- Take a few ice cubes in a glass. Keep it on the table for a few minute...
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- Biscuits kept open on a plate during monsoon days lose its'crispness.W...
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- Analogy: Photosynthesis ::: Respiration : Oxygen.
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- Who is Jan Ingenhousz?
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- Analogy.</br> Industrial cites: :: Windy places: dust particles.
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- Why aircraft usually fly above the troposphere layer?
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- Write the composition of gases in atmosphere.
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- What is dry ice? What is its use?
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- Write the word equation for respiration process.
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- Why is atmosphere essential for life on earth?
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