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प्रश्न
What do elephants do to prevent water from evaporating ?
उत्तर
Elephants designed fly-whisks and back scratchers from branches, and used strips of chewed up dark to plug small waterholes to prevent the water from evaporating.
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संबंधित प्रश्न
Write a character sketch of Mr. Barrymore in about 125 words
Read the text below and summarise it.
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.
Staff Writer, Washington Post
Why did the narrator of the story want to forget the address?
How does the poem capture the elusive nature of the peacock?
How does the poet tossed back from ecstasy into despair?
Rearrange the letters to make meaningful words, occurring in the poem.
- clearmis ____________
- sowmid ____________
- gearuoc ____________
- rissupser ____________
- tabyue ____________
- madres ____________
- laveu ____________
- downre ____________
Answer in your own words.
How did Revathi prove to the organisers of the competition, that the plants truly belonged to her?
Paraphrase the poem in your own simple language. Write it down in your notebook.
Using a dictionary/internet note down the main difference between a remote-sensing satellite and a natural satellite.
The kite - Bazar in Ahmedabad, is open day and night for a week.
Correct the following statement.
Johnsy was eager to recover from her illness.
Say WHY. . . . . .
Hardy invited Littlewood for a discussion.
Comment on the given statement after reading the given dialogue -
I wouldn’t be in your shoes if he rewards me ten times as much. People generally fall victim to incentives. Some people stick to values. They _________________.
Choose the odd one out :
Bottom, Moth, Mustardseed, Cobweb.
Write about how you take care of your books.
Answer in your own words.
What chores did the boys from 1000 CE and 1st Century CE, do on their farms/fields?
Pick out three examples of interrogation (rhetorical questions) from the poem.
Explain in your own words the point that each one makes.
| Interrogation | Explanation |
| (1) | |
| (2) | |
| (3) |
Describe the following with the help of the (The Twelve Months) story.
Winter
Prospero ordered Ariel to bring ____________ to his place.
Why had Prospero raised a violent storm in the sea?
Is the bird a crow?
Write the name of the toys against each picture.
Activity
It’s fun to help out in the kitchen. You can even practice reading aloud when reading the recipe. And you can learn a little math by figuring out how to measure. Here are a few fun items to make that are “Alice” themed.
stained by - mark made on clothes or materials
The white washed walls were stained by many monsoons. ______
Mother called ______.
Did Santhosh enjoy his morning walk? How do you know?
Try your own.
Look at the picture and Choose the correct word.
Where did the tanker man take the water from the village?
Match the following items from column-A with those column-B:
| Column 'A' | Column 'Non-Textual' |
| (a) Geoffrey Chaucer | (i) Trinidad |
| (b) Daniel Defoe | (ii) Wuthering Heights |
| (c) V.S. Naipaul | (iii) Robinson Crusoe |
| (d) Emile Bronte | (iv) The Canterbury Tales |
