Tag: air exerts pressure

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

Which of the following plays a major role in the formation of a thunderstorm?

  1. Conduction

  2. Convection

  3. Radiation

  4. All of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Convection plays a major role in the formation of a thunderstorm. When warm air rises and meets the cold air, it condenses (releases latent heat). The heat helps fuel the thunderstorm. Then the downdraft forms, bringing cold air and precipitation down to the earth's surface.   

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

Which of the following are the uses of air?

  1. Generating electricity

  2. Disposal of seeds

  3. Flying of birds

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

Mountaineers carry oxygen cylinders with them because:

  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
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

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

  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
Reveal answer Fill a bubble to check yourself
D Correct answer
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.
Multiple choice geography properties of natural resources the concept of bernoulli's principle variations in atmospheric pressure air exerts pressure

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

  1. high temperature conditions

  2. heavy rainfall

  3. low pressure conditions

  4. high humditiy conditions
Reveal answer Fill a bubble to check yourself
C Correct answer
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.