When does a Solar Eclipse occur?

The Moon is 400 times smaller than the Sun but about 400 times closer. So we see them both as about the same size. A solar eclipse is when the Moon blocks out the light from the Sun. This can make the day turn as all the light from the Sun is blocked out in a total eclipse. In a partial eclipse only part of the light is blocked out. The Sun is our nearest star. It is 149.6 million km ( 92.9 million...

February 28th, 2011 by admin 

When are Deserts cold?

About one – third of the word’s land surface is covered by desert. Not all these deserts are hot and arid. Antarctica is the biggest cold desert in the world. The blanket of two – km – thick ice covering the Tundra, Howling winds and freezing temperatures stop plants and land living animals from surviving. but the ocean around this frozen desert is full of fish and krill, so...

February 28th, 2011 by admin 

When do we see Mirages?

Mirages from in hot deserts where the air is so hot it bends and distorts light rays. The shimmering images that a mirage produces have often tricked travellers in deserts. People think that they can see an oasis or town on the horizon, but in reality it is not there. Under certain conditions, such as a stretch of pavement or desert air heated by intense sunshine, the air rapidly cools with elevation...

February 28th, 2011 by admin 

When does the Sun stop shining?

The Sun is our nearest star. Stars are massive nuclear reactors generating energy in their cores. It is the heat and light from the Sun that makes life on Earth possible. The Sun for us is a pretty steady and dependable thing. Whether we can see it or not, we know it is always there, and the answer to this question is – the Sun Never stops shining. As the Earth spins on its axis, the Sun always...

February 28th, 2011 by admin 

When do birds migrate?

Migration is the mass movement of groups of animals or birds. It is caused by the need ti find food, by climatic changes during the year, and by the need to breed. Every autumn, for example, swallows gather in large flocks to rest before they begin their long migration to Africa. Swallows, and their relatives, swifts and martins, all migrate to Africa when the weather becomes too cold for them to catch...

February 28th, 2011 by admin 

When do trees stop growing?

The simple answer to this question is that tress never stop growing. Trees are the largest living organisms on Earth. The largest tree of all is the Californian giant redwood which can grow nearly 100m high and can have a trunk that is 11 meters thick. The oldest known trees are bristlecone pine trees. They grow in the White Mountains in California, in USA. Although they are quite small, some of these...

February 28th, 2011 by admin 

Bal Gangadhar Tilak

Bal Gangadhar Tilak ( July 23, 1856 – August 1, 1920 ) :  Bal Gangadhar Tilak was a great leader of the Indian freedom struggle. He was born in 1856 in the small coastal town of  Ratnagiri in Maharashtra. He was convinced that the British educational system was not good enough for Indians. Tilak stressed upon Swadeshi and advocated the boycott of foreign goods. He founded his newspaper ‘Kesari’...

February 28th, 2011 by admin 

Dr. Babasaheb Bhimrao Ambedkar

B. R. Ambedkar ( April 14, 1891 – December 6, 1956 ): Babasaheb Bhimrao Ranji Ambedkar was a great leader of tht ‘Harijans’ of India. He was also a scholar and patriot. He was born on April 14, 1891 in a poor Mahar family of  Madhya Pradesh. He had bitter experience as an untouchable in his childhood. He did his Ph.D. and Bar-at-Law from England in 1921 and began to practice law. Soon, He became...

February 28th, 2011 by admin 

A.P.J. Abdul Kalam

A.P.J. Abdul Kalam (October 15, 1931) : Avul Pakir Jainulabdeen Abdul Kalam is a scientists – turned – Executive Head. He was born on October  15, 1931 at Rameshwaram in Tamiln Nadu. He studied at Schwartz High school in Ramanathapuram. He graduated in Science from St. Joseph’s College at Truchi. He did his D.M.I.T in Aeronautical Engering  at M.I.T., Chennai. Kalam joined Hindustan Aeronautics...

February 28th, 2011 by admin 

Mahatma Gandhi

Mahatma Gandhi ( October2, 1869 – January 31, 1948 ) Mohandas Karamchand Gandhi, also known as Mahatma Gandhi, was born in Porbander, Gujrat in India on October 2, 1869. He was raised in a very orthodox family. At the age of 13, he was married to Kasturba. He was educated in law at University College, London. In 1891. After returning  to India he attempted  to practice law in Bombay, without much...

February 26th, 2011 by admin