Question

Read the passage given below and answer the questions

that follow :


Floods are second only to fire as the most common of all

natural disasters. They occur almost everywhere in the

world, resulting in widespread damage and even death.

Consequently, scientists have long tried to perfect their

ability to predict floods. So far the best that scientists can

do is to recognize the potential for flooding in certain

conditions. There are a number of conditions, from deep

snow on the ground to human error, that cause flooding.

When deep snow melts it creates a large amount of water.

Although deep snow alone rarely causes floods, when it

occurs together with heavy rain and sudden warmer

weather it can lead to serious flooding. If there is a fast

snow melt on top of frozen or very wet ground or ground

that is very wet and already saturated with water cannot

absorb the additional water created by the melting snow.Melting snow also contributes to high water levels in rivers

and streams. Whenever rivers are already at their full

capacity of water, heavy rains will result in the rivers

overflowing and flooding the surrounding land.

Rivers that are covered with ice can also lead to flooding.

When ice begins to melt, the surface of the ice cracks and

breaks into large pieces. These pieces of ice move and

float down the river. They can form a dam in the river,

causing the water behind the dam to rise and flood the

land upstream. If the dam breaks suddenly, then the large

amount of water held behind the dam can flood the areas

downstream too.

Broken ice dams are not the only dam problems that can

cause flooding. When a large human-made dam breaks or

fails to hold the water collected behind it, the results can

be devastating. Dams contain such huge amounts of water

behind them that when sudden breaks occur, the

destructive force of the water is like a great tidal wave.

Unleashed dam waters can travel tens of kilometers, cover

the ground in meters of mud and debris, and drown and

crush everything and creatures in their path.

Although scientists cannot always predict exactly when

floods will occur, they do know a great deal about when

floods are likely, or probably, going to occur. Deep snow,

ice-covered rivers, and weak dams are all strong conditions

for potential flooding. Hopefully, this knowledge of why

floods happen can help us reduce the damage they cause. Give the meanings of the following words as used

in the passage. One word answers or short phrases

will be accepted :


i) upstream

ii) unleashed

iii) potential


b) Answer the following questions briefly in your own

words :


i) Name a few natural disasters. What causes floods

as stated according to the passage?


ii) How does deep snow cause flooding?


iii) How far can dam water travel when it is unleashed

from a broken dam? What is the most common

natural disaster?


iv) Why does saturated ground contribute to flooding

problems?


v) What kinds of problems can floods cause?


c) In not more than 50 words, summarise how melting

snow cause problems related to flooding?
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Answer 1

Answer:

thank you for the question but not interested