Unseen Comprehension Passage Class 8 Ex. 7 & 8

unseen passages

                                                                    PASSAGE -7

Read the following passages carefully and answer the questions that follow –
Man does not live by food alone. Water is vital to human health and fitness. Although it is not a nutrient per se as are carbohydrates, fats, proteins, vitamins and minerals. It, in fact, is a key nutrient in as much as no life is possible without it. Whereas we can do for weeks without food, we cannot live without water longer than a couple of days. Water approximates 60 per cent of the body weight of human adults. The total amount of water in a man weighing 70 kilograms is approximately a little over 40 liters. It is an excellent solvent – more substances are soluble in water than in any other liquid known so far. This makes it an ideal constituent of the body fluids which sustain life supporting chemical reactions. It dissolves varied products of digestion and transports them to the rest of the body. Likewise, it dissolves diverse metabolic wastes and helps drain them out of the body. Besides, it performs a variety of functions some well known and well understood while others not so well appreciated yet vital. The no less important role of water is to distribute/dissipate the body heat efficiently, thereby regulating the body’s temperature. Water accomplishes this role ideally because it has thermal conductivity ensuring rapid heat from one part to the other. Above all, water has a high-specific heat, implying that it takes a lot of heat to raise the temperature of water and likewise much heat must be lost to lower its temperature. Drinking a lot of water is an inexpensive way to stay healthy. Even excess of water is harmless. Water therapy drinking a liter or so the first thing in the morning is kidney-friendly. The water regulation in the body is affected by hypothalamus in two ways i.e.,(i) by creating the sensation of thirst which makes us drink water and (ii) by controlling the excretion of water and urine. If water regulation fails, medical emergency ensues.

1. Man cannot live for more than a couple of days
(a) Without food                 (b) without water              (c) without oxygen                 (d) without fruits

2. Water is an excellent solvent because
(i) It regulates excretion of urine                (ii) It dissolves metabolic wastes
(iii) It drains wastes out of body                 (iv) More substances are soluble in it than in any other liquid.

3. The high thermal conductivity of water helps to
(i) Dissolve food                                              (ii) Dissolve metabolic wastes
(iii) Regulate body temperature                  (iv) Sustain life supporting chemical reactions

4. The total amount of water in a man weighing 70 kg is
(i) Approximately 70 liters                          (ii) Approximately 60 liters
(iii) Approximately 40 liters                        (iv) Approximately 50 liters

5. High specific-heat of water means
(i) It has high thermal conductivity                      (ii) It takes less heat to raise its temperature
(iii) It takes more heat to raise its temperature (iv) It distributes the body heat efficiently

6. Drinking a liter of water in the morning is called
(i) Hypothalamus           (ii) water regulation          (iii) kidney therapy        (iv) water therapy

7. The word ‘ ideal’ means
{i} lazy                {ii} most suitable                {iii} valuable             {iv} good

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PASSAGE -8

Read the following passage carefully and answer the questions that follow –
                                                                                   CARS
Karl Benz invented the modern car in 1888 in Germany. Emile Roger worked for Benz in France. He made cars in France. By 1900, many people were building cars in France and in the U.S. The first company to build only cars was Panhard et Levassor in France. Panhard started in 1889. The Peugeot car company started in 1891 in France. In the US, Frank and Charles Duryea started the Duryea Motor Wagon Company in 1893. It was the first US car company. By 1902, Ransom E. Olds started the Olds Motor Vehicle Company. A year later, Henry Ford started the Ford Motor company. It produced the Cadillac. All these early modern cars burned gasoline or diesel fuel. Ford opened factories in France and Britain in 1911. Then, they opened a factory in Denmark in 1923. Later, they opened a factory in Germany in 1925. Ford was one of the first manufacturers to use an assembly line. With an assembly line, factory workers could produce cars faster and safer than other production systems. Most modern cars still burn gasoline or diesel fuel. These cars cause air pollution. They get the air dirty. Now many people are looking for cleaner cars. And, many car companies are looking for cleaner fuels .

1) Which company first built only cars?
A. Benz             B. Ford                 C. Duryea                 D. Panhard

2) When did the Peugeot car company start?
A. 1888             B. 1889                 C. 1890                      D. 1891

3) What was the first U.S. car company?
A. Ford             B. Olds                 C. Duryea                  D. Cadillac

4) The Ford Motor Company opened a…
A. factory in Denmark in 1911            B. factory in Germany in 1925 

C. factory in Britain in 1929                 D. factory in France in 1931

5) Whose idea was the assembly line?
A. Charles Duryea’s            B. Emile Roger’s                 C. Henry Ford’s             D. Karl Benz’s

6) Produced means…
A. bought               B. named                    C. made               D. sold

7) Fuel is..
A. a car production system       B. what makes cars go       C. the price of a car        D. None of the above

8) Pollution in the air is…
A. dirty air                 B. clean air               C. a kind of fuel                 D. a system of production.

                                                              ANSWERS

1. Duryea           2. 1891                 3. Duryea                  4. factory in Germany in 1925

5. Henry Ford’s                             6. made.                7. what makes cars go             8. dirty air.

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