NCERT Solutions | Class 11 English Chapter 15 | Summarising

NCERT Solutions for Class 11 English Chapter 15 Summarising

CBSE Solutions | English Hornbill Class 11

Check the below NCERT Solutions for Class 11 English Hornbill Chapter 15 Summarising Pdf free download. NCERT Solutions Class 11 English were prepared based on the latest exam pattern. We have Provided Summarising Class 11 English NCERT Solutions to help students understand the concept very well.

NCERT | Class 11 English Hornbill

NCERT Solutions Class 11 English Hornbill
Book:	National Council of Educational Research and Training (NCERT)
Board:	Central Board of Secondary Education (CBSE)
Class:	11th
Subject:	English Hornbill
Chapter:	15
Chapters Name:	Summarising
Medium:	English

Summarising | Class 11 English | NCERT Books Solutions

You can refer to MCQ Questions for Class 11 English Chapter 15 Summarising to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Page No 96:

Question 1:

Read the text below and summarise it.

Green Sahara

The Great Desert Where Hippos Once Wallowed

The Sahara sets a standard for dry land. It’s the world’s largest desert. Relative humidity can drop into the low single digits. There are places where it rains only about once a century. There are people who reach the end of their lives without ever seeing water come from the sky.

Yet beneath the Sahara are vast aquifers of fresh water, enough liquid to fill a small sea. It is fossil water, a treasure laid down in prehistoric times, some of it possibly a million years old. Just 6,000 years ago, the Sahara was a much different place.

It was green. Prehistoric rock art in the Sahara shows something surprising: hippopotamuses, which need year-round water.

“We don’t have much evidence of a tropical paradise out there, but we had something perfectly liveable,” says Jennifer Smith, a geologist at Washington University in St Louis.

The green Sahara was the product of the migration of the paleo-monsoon. In the same way that ice ages come and go, so too do monsoons migrate north and south. The dynamics of earth’s motion are responsible. The tilt of the earth’s axis varies in a regular cycle — sometimes the planet is more tilted towards the sun, sometimes less so. The axis also wobbles like a spinning top. The date of the earth’s perihelion — its closest approach to the sun — varies in cycle as well.

At times when the Northern Hemisphere tilts sharply towards the sun and the planet makes its closest approach, the increased blast of sunlight during the north’s summer months can cause the African monsoon (which currently occurs between the Equator and roughly 17°N latitude) to shift to the north as it did 10,000 years ago, inundating North Africa.

Around 5,000 years ago the monsoon shifted dramatically southward again. The prehistoric inhabitants of the Sahara discovered that their relatively green surroundings were undergoing something worse than a drought (and perhaps they migrated towards the Nile Valley, where Egyptian culture began to flourish at around the same time).

“We’re learning, and only in recent years, that some climate changes in the past have been as rapid as anything underway today,” says Robert Giegengack, a University of Pennsylvania geologist.

As the land dried out and vegetation decreased, the soil lost its ability to hold water when it did rain. Fewer clouds formed from evaporation. When it rained, the water washed away and evaporated quickly. There was a kind of runaway drying effect. By 4,000 years ago the Sahara had become what it is today.

No one knows how human-driven climate change may alter the Sahara in the future. It’s something scientists can ponder while sipping bottled fossil water pumped from underground.

“It’s the best water in Egypt,” Giegengack said — clean, refreshing mineral water. If you want to drink something good, try the ancient buried treasure of the Sahara.

JOEL ACHENBACK
Staff Writer, Washington Post

Answer:

Sahara is the world’s largest desert. Yet beneath its surface could be found vast aquifers of fresh water. The basis of the huge ‘buried treasure’ of water was laid down in prehistoric times. The water found is clean and refreshing.
6000 years ago, Sahara was quite a different place. It was full of greenery and water. Prehistoric rock-art of Sahara indicates the presence of hippopotamuses which need water round the year. Migration of Paleo-monsoon to the Sahara region led to its wet and rainy climatic conditions.
Later, around 5000 years ago, the monsoon shifted towards south, leaving Sahara in a state of drought. This led the inhabitants to migrate to the Nile Valley. The shift in the earth’s axis and decreased precipitation left the place dried out. Consequently, the soil lost its ability to hold water and vegetation decreased. For the past 4000 years Sahara has remained the same.

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Summarising

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NCERT Solutions | Class 11 English Chapter 15

NCERT Solutions | Class 11 English Chapter 15 | Summarising

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Summarising | Class 11 English | NCERT Books Solutions

Page No 96:

Question 1:

Class 11 English Book

Summarising

NCERT Solutions | Class 11 English Hornbill, Woven Words, Snapshots

NCERT Solutions | Class 11 English Hornbill

NCERT Solutions | Class 11 English Woven Words

NCERT Solutions | Class 11 English Snapshots

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