Science & Mathematics Questions & Answers

A lizard is capable of shedding its tail at any time. If a lizard is attacked it may sacrifice its tail in an attempt to surprise and confuse the enemy. When a lizard’s tail is caught by an assailant or a trap, it will simply snap off and enable the reptile to escape. Although some lizards’ tails can be four …

Dowsing is an ancient way of finding water. The dowser holds one end of the Y-shaped twig in each hand, and walks around until the stem twitches downward, showing where is buried.

Rainwater that sleeps into the ground filters down to the zone of saturation, where every crack in the rock is filled with water. (Below this point compact rocks stop the water going any deeper.) The top level of the zone of saturation is called the water table. This level rises and falls according to the weather, and walls sunk down …

One of the most difficult tasks of geology (the science or study of the Earth), has been to establish the age of the Earth. Until about fifty years ago the scientists had little information to help them with this problem. By careful observation they could discover whether one rock was older than another, but the further back they went in …

When Christopher Columbus made his first landfall in the Bahamas he was so certain that he had reached the East Indies that he called the natives ‘Indians’, the name by which they are still known today. He found them a friendly, peaceful people. Spaniards who explored what is now the southwestern United States found the natives equally friendly. They lived …

 When you overturn a sauce bottle that has been left untouched for some time, chances are, either the sauce will not come out at all or a gigantic blob will plop down on your plate. Getting ketchup to �flow� out of the bottle can be quite an ordeal. However, if you shake the bottle before overturning it, the thick gooey …

As day breaks, a reddish-white ball of light that we call the sun, rises. This red haze gives way to a golden-white sheen as the day advances and reappears when the sun sets in the evening. Does the sun really change colours, or does it only seem so? The explanation lies in-between. Light from the sun consists of three kinds …

Bicycles of many shapes and sizes have led up to the bicycle was know today. The ‘penny-farthing’ bicycle was first seen on the roads of England in 1871. it was invented by James Starley, who later became known as the ‘father of the cycle industry’. It had a large front wheel which varied between 100-150 cm in diameter, and a …

Trade in human slaves began in the earliest times and went on until the nineteenth century. But it was in the sixteenth century, after the discovery of America when the need grew for labour on the new plantations, that the slave trade began to increase. Its center was Africa. Millions of slaves were transported from that continent. The British, French, …

Violet and blue light have short waves and are scattered ten times more than red light waves by atmosphere. While the red light goes almost straight through the atmosphere, blue and violet are scattered by particles in the atmosphere. Thus we see a blue sky.