Tag: variations in atmospheric pressure

Questions Related to variations in atmospheric pressure

Which of the following are the uses of air?

biology properties of natural resources the concept of bernoulli's principle variations in atmospheric pressure air exerts pressure

  1. Generating electricity

  2. Disposal of seeds

  3. Flying of birds

  4. All of the above

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Correct Option: D
Explanation:

Air is used in generating electricity for example wind mill is used to generate electricity. 

Dispersal of seeds means transport of seeds away from parent plant. Gravity, wind, ballistic, water and by animals are five modes of seed dispersal. 
Flying of birds as bird use their strong breast muscles to flab their wings and give them the thrust to move through the air and fly.

Mountaineers carry oxygen cylinders with them because:

biology properties of natural resources the concept of bernoulli's principle variations in atmospheric pressure air exerts pressure

  1. oxygen supports combustion

  2. air becomes thinner as we go higher

  3. air is dense but lacks oxygen in mountains

  4. none of the above

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Correct Option: B
Explanation:

As we go higher and higher the pressure and oxygen decreases, so as due to less oxygen content mountaineers carry oxygen cylinders with them.

Which of the following statements is true regarding the properties of air?

biology properties of natural resources the concept of bernoulli's principle variations in atmospheric pressure air exerts pressure

  1. It is a good conductor of electricity.

  2. It is a good conductor of heat.

  3. It is translucent in nature.

  4. None of the above

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Correct Option: D
Explanation:
Properties of air are as follows-
$1.$ Air is bad conductor of electricity.
$2.$ Air is bad conductor of heat.
$3.$ Air is not translucent it is transparent.

The power of diffusion is:

biology properties of natural resources the concept of bernoulli's principle variations in atmospheric pressure air exerts pressure

  1. more in solids

  2. least in gases

  3. maximum in liquids

  4. maximum in gases

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Correct Option: D
Explanation:

The power of diffusion is max in gases because the inter-molecular space between the molecules is highest in gases,

So the particles easily diffuse each other.

Which of the following statement is/are correct ?

biology properties of natural resources the concept of bernoulli's principle variations in atmospheric pressure air exerts pressure

  1. At altitudes, the pressure of air is low

  2. At altitudes, density of air is low

  3. At altitudes, cooking takes place slower

  4. At altitudes, water will boil at a temperature greater than $100^{\circ} C$

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Correct Option: A,B,C

Cyclones become very destructive in area of Bay of Bengal during early November because of _________.

geography properties of natural resources the concept of bernoulli's principle variations in atmospheric pressure air exerts pressure

  1. high temperature conditions

  2. heavy rainfall

  3. low pressure conditions

  4. high humditiy conditions

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Correct Option: C
Explanation:

During winter season land areas become cold and adjoining ocean surface becomes comparatively hot. So low-pressure centers develop in the ocean and the winds started blowing from surrounding high pressure to low pressure areas. As it comes to the low-pressure center, it gets warm and rises up. For this mechanism, devastating cyclones originated in the Bay of Bengal during October to early November.