Subjective Questions For Air Around Us

Air Around Us of Class 6

Name the component of air which condenses on a cold surface to form drops of a liquid.
How will you show that air (or oxygen) is necessary for burning?
Explain how, the oxygen in air (or atmosphere) is replaced.
Plants use carbon dioxide from air for photosynthesis. How is the carbon dioxide in air (or atmosphere) replaced?
Explain why, when an empty glass bottle is inverted into a bucket of water vertically, water does not enter the bottle.
Explain why, a burning candle stops burning after some time when covered with an inverted gas jar.
How do animals that live in soil get oxygen for breathing (or respiration)?
How do the roots of land plants get oxygen for respiration?