Questions

Q:

Which of the following causes tornadoes?

A) condensation B) dry climates
C) wind shear D) stationary fronts
 
Answer & Explanation Answer: B) dry climates

Explanation:

Conditions suitable for the formation of a tornado develop when varying temperatures and humidity come together and form thunderclouds. This refers to the presence of warm and moist condition in the lower atmosphere and cold and dry conditions in the upper atmosphere. The place where these varying masses of air meet is known as the dry-line. Such conditions, which are suitable for the formation of a tornado, are most often observed just before a low pressure system develops.

 

Once the ideal conditions occur, the warm air tries to rise in the atmosphere, while the cold air blocks it. This makes the air in between rotate horizontally. In the meanwhile, the land is heated by the Sun, and hence, the air near the ground becomes warm and starts rising. Continuous fueling by the heat energy from the Sun ensures that the warm air has an upper hand over cold air. As a result of this, the cold air at the top starts sinking and the warm air below starts rising in a spinning motion. As the amount of warm air increases, the formation gains height and becomes intense. The intensity of these devastating tornadoes is such that they can clear off anything that comes in their path.

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Q:

Generally, plants absorb dissolved nitrates from soil and convert them into

A) Ammonia B) Urea
C) Protein D) Nitrogen
 
Answer & Explanation Answer: D) Nitrogen

Explanation:

Generally, plants absorb dissolved nitrates from soil and convert them into free nitrogen.

 

  • Free nitrogen is simply molecular nitrogen (N2).

 

  • Nitrogen, in its molecular form, consists of two nitrogen atoms bound together with a triple bond.
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Q:

In which of the following organelles does photosynthesis take place?

A) Miochondria B) Chloroplast
C) Central Vacuole D) Ribosome
 
Answer & Explanation Answer: B) Chloroplast

Explanation:

Chloroplasts use energy from light to transform carbon dioxide and water into sugar and oxygen.

A green pigment located in membranes within the chloroplasts of plants and algae and in the membranes of certain prokaryotes.

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Q:

What is multi - level marketing (MLM)?

Answer

It is a marketing strategy in which the sales force is compensated not only for sales they personally generate, but also for the sales of the other salespeople that they recruit. This recruited sales force is reffered to as the participant's 'downline' , and can provide multiple levels of compensation. Other terms used for MLM include pyramid selling, network marketing and refferal marketing. Most commonly, the salespeople are expected to sell products directly to consumers by means of relationship referrals and word-of-mouth marketing.

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Q:

What are three characteristics of the agricultural revolution?

A) Farmers learned to control water through wells and canals B) New tools made it possible for more crops to be grown
C) Crop rotation was invented, making it harder on soil D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:
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Q:

The function of nitrogen in air is 

A) to make air a moderate supporter of combustion B) to maintain the density of air constant
C) to prevent the hydrogen in air from exploding D) to reduce the poisonous nature of ozone in air
 
Answer & Explanation Answer: A) to make air a moderate supporter of combustion

Explanation:

If air contained all oxygen and no nitrogen, everything would have burnt off

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Q:

MPG extension refers usually to what kind of file?

A) MS Office document B) Image file
C) Word Perfect Document file D) Animation/movie file
 
Answer & Explanation Answer: D) Animation/movie file

Explanation:
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Q:

What will happen if an object is dropped from a height and there is no air resistance?

A) It will fall with a constant speed and acceleration B) Its acceleration will increase
C) Both speed and acceleration will increase D) Its speed will increase
 
Answer & Explanation Answer: D) Its speed will increase

Explanation:
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