Page 2 - LN

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W When the temperature increases, air expands and rises up. As a result, air pressure decreases.
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When the temperature increases, air expands and rises up. As a result, air pressure decreases.
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Humidity:
W h e n t h e h u m i d i t y i s h i g h , t h e a i r p r e s su r e i s l e ss.
When the humidity is high, the air pressure is less.
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It is due to moist air has more number of water molecules and less number of nitrogen and oxygen

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I It is due to moist air has more number of water molecules and less number of

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molecules resulting into less air pressure.
m o l e cu l e s r e s u l t i n g i n t o l e ss a i r p r e ssu r e .

Applications:
I. M Mountaineers while tracking higher mountains suffer nose bleeding sometimes.
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Mountaineers while tracking higher mountains suffer nose bleeding sometimes. As
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the altitude increases the atmospheric pressure decrease. And the air becomes
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high altitude
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which the blood vessels present inside our nose bursts and starts bleeding.
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bursts and starts
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II. Mountaineers carries Oxygen cylinder on higher mountainss with them because when
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cl i m b i n g m o u n t a i n s , a s t h e a l t i t u d e r i se s t h e a m o u n t o oxygen
climbing mountains, as the altitude rises the amount off oxygen in the air decreases
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(due to lack of trees at high altitudes) because of which mountaineers can suffer
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from dizziness.

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III. High speed wind causes reduced pressure in the specific region as it also blows
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w wind causes reduced pressure in the specific region as it also blows
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l large amount of air from that region. As the quantity of air molecules gets reduced,
large amount of air from that region. As the quantity of air molecules gets reduced,
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IV. As moving air reduces the air pressure. When air bblows over or below an object, the
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r lows over or below an object, the
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a air pressure gets reduced over or below the area of that object. As a result, a
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air pressure gets reduced over or below the area of that object. As a result, a

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pressure difference gets created between two opposite sides of the object which

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provides a lift and moves the object.
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