Class 7 Exam > Class 7 Notes > NCERT Solutions: Chapter 3 - The Desert, Class 7, English (An Alien Hand)
Chapter 3 - The Desert, Class 7, English (An Alien Hand) NCERT Solutions PDF Download
CBSE CLASS VII - ENGLISH - AN ALIEN HAND - CH 3 - THE DESERT
Q.1 : From the first paragraph
(i) pick out two phrases which describe the desert as most people believe it is;
(ii) pick out two phrases which describe the desert as specialists see it.
Which do you think is an apt description, and why?
ANS : (i) Two phrases which describe the desert as most people believe it is:
Q.2: The phrases on the left in the following box occur in the text.
ANS : (i) an endless stretch of sand ---- nothing but sand as far as one can see
(i) pick out two phrases which describe the desert as most people believe it is;
(ii) pick out two phrases which describe the desert as specialists see it.
Which do you think is an apt description, and why?
ANS : (i) Two phrases which describe the desert as most people believe it is:
“dry, hot, waterless and without shelter”
“a flat, unchanging wasteland of dry sand”
(ii) Two phrases which describe the desert as specialists see it:
“a beautiful place”
“home of a variety of people, animals and plants”
The description of the desert as specialists see it is more apt as their description is based on actual studies, and not just on beliefs and assumptions.
Match each of them with a phrase on the right.
(i) an endless stretch of sand | fertile place with water and plants in a desert |
(ii) waterless and without shelter | Not visible because the grass is thick |
(iii) an oasis | Nothing but sand as far as one can see |
(iv) hidden by a cover of grass | No water and no shade |
(ii) waterless and without shelter-- no water and no shade
(iii) an oasis -- fertile place with water and plants in a desert (iv) hidden by a cover of grass -- not visible because the grass is thick
Q.3 : A camel can do without water for days together. What is the reason given in the text?
ANS : Camels can do without water for days together. The reason is they retain the water they drink for long periods of time, they sweat very little and can stand high body temperature.
Q.4: How do the smaller desert animals fulfil their need for water?
ANS : The smaller desert animals do not drink water. They burrow underground during the hot day and come out at night to eat. Some of them eat other animals and get the water they require from the moisture in the meat. Others eat plants and seeds, and get the water they require from plant juices.
Q.5: In a desert the temperature rises during the day and falls rapidly at night. Why?
ANS : In humid climates, the moisture in the air acts like a blanket and protects the earth’s surface from the hot rays of the sun. The absence of this blanket in desert lands causes the desert to heat up rapidly during the day and to cool off rapidly at night.
FAQs on Chapter 3 - The Desert, Class 7, English (An Alien Hand) NCERT Solutions
| 1. What is the desert biome? |  |
Ans. The desert biome is a dry region characterized by little to no rainfall, high temperatures during the day, and low temperatures at night. It is also known for its barren landscape, sand dunes, and cacti.
| 2. What are some adaptations of desert animals? | |
Ans. Desert animals have various adaptations to survive in the harsh desert environment. Some of these adaptations include the ability to store water for long periods, the ability to burrow underground to escape extreme temperatures, and the ability to hunt at night when temperatures are cooler.
| 3. How do plants survive in the desert? | |
Ans. Plants in the desert have adapted to the harsh environment by developing deep roots to reach the underground water sources, thick waxy leaves to retain moisture, and spines instead of leaves to reduce water loss by transpiration.
| 4. What are some human activities that threaten the desert biome? | |
Ans. Human activities such as deforestation, overgrazing, and urbanization can threaten the desert biome. These activities can lead to soil erosion, loss of habitat, and destruction of the delicate balance of the desert ecosystem.
| 5. What is desertification and how can it be prevented? | |
Ans. Desertification is the process of fertile land becoming desert due to human activities like overgrazing, deforestation, and improper farming practices. To prevent desertification, steps such as preventing overgrazing, planting trees, and using sustainable farming practices can be taken. Additionally, educating people about the importance of the desert ecosystem can also help prevent desertification.
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