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How Do Fish Survive in Icy Waters?
In cold winter months, lakes and rivers freeze over forming ice. Yet, fish and other aquatic animals manage to survive. Animals like seals, penguins, walruses and a wide variety of sea birds are all fish eaters. They live in the Arctic and Antarctic Circle, amidst the icecaps. The land is completely frozen. Yet these animals manage to live in this region. How do they do it? The icy waters of the Arctic and Antarctic Oceans support a great amount of marine life....
Why can’t the Sun melt Snow?
There are some things in nature that have a great capacity to toss back or reflect a great deal of the sun’s light that falls on them. One of them is snow. Newly formed snow reflects about 90 per cent of the sunlight that falls upon it. This means that the sun is powerless to melt clean snow. And when snow does melt, it is not because of the sunlight. Snow does not melt on a spring day because of the sun’s heat....
How Does Ice float?
A cool glass of water topped with huge chunks of ice is sure to quench your thirst on a hot summer day. But, before you guzzle the water, look at how the ice floats on the water surface. How do these large ice pieces manage to stay afloat? Ice floats because it is less dense than water. (If you take a one-litre container with ice and weigh it, it will be lighter than a similar container with water....
Why do Humans Sweat?
It is an annual ritual in most Indian homes. With the onset of summer it is time to bring the rusty, rickety old coolers down from the terrace and get them repaired. The reason is obvious – it is difficult to live through the hot, sweaty Indian summer without an air cooler. But did you know that the human body has its own cooler as well? Think of the times you have travelled in a car....
Getting Bored – Read This
Getting Bored – Read This [Illustration by Anup Singh] Pooja Desai studies in Class IX at Jasudben M L School in Mumbai. Here she writes for all those who are getting bored and have nothing to do. If you have nothing to do at all, think what you would like to do, watch tv, drink water, go to see a movie, sleep, read or nothing of this sort. If you still have nothing to do read this....
A Beautiful Ship in the Sky
In the boundless ocean of space, a beautiful ship sails serenely around the sun. Our earth – Lovelier than the moon, this fragile ship travels one hundred and sixty thousand kilometres every hour. Space is full of countless such ships. But our Earth is special. It is the only ship which carries life – the only ship with voyagers on board. Four hundred thousand different kinds of life make their home on Earth. Together, they make it beautiful and precious....
The Earth Is Getting dimmer
If you have viewed a crescent moon on a clear night, you would have observed an eerie glow around the moon. This is called earthshine. Do you know why the moon glows? The eerie glow around a crescent moon is called earthshine. Our earth and the moon act as giant mirrors that reflect sunlight. Actually most objects reflect light. A mirror reflects almost all the light that falls on it. And an object that does not reflect light is called opaque....
Global Warming
Konish Biswas, a student of Standard VIII puts forth his views on a problem that is affecting the whole planet. Nowadays as you know, there is a lot of pollution in the atmosphere. The level of carbon dioxide and other such gases (known as greenhouse gases) is rising. These gases trap the heat and do not let it escape from the atmosphere. Global Warming [Illustration by Sudheer Nath] When the presence of these gases goes beyond a level, the temperature rises....
Fossil of Giant Snake Found in South America
Where: Cerrejon, Colombia February 4, 2009 : ‘Nature’ journal reports that the snake, named ‘Titanoboa cerrejonensis’ by the scientists who found the remains, would have had a 13-metre-long body and weighed 1,140 kilograms, making it the largest snake on record. A mathematical ratio between the size of vertebrae and the length of the body in living snakes was used by the team to estimate the size. The world’s heaviest snakes, green anacondas, weigh only 250 kilograms, and the longest, reticulated pythons, measure 10 metres at the most....
The Lake and the Birds
Where: Himachal Pradesh, India March 8, 2001: The picturesque Pong Dam lake region in the mountainous state of Himachal Pradesh, is losing its lustre. A great deal of its charm has lain in the fact that it is north India’s largest refuge for migrating birds escaping harsh winters abroad. But not for long, if recent trends are any indication. A low water level in the lake this year has forced the migratory birds to fly away one month in advance, says a report in The Indian Express....
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