Science & Mathematics Questions & Answers

Glaciers form when show piles up in mountain hollows, called cirques. The snow is gradually compacted into a white substance, halfway between snow and ice. As the pressure increases, the ice crystals become closely interlocked, while water, seeping down from above, refreezes and binds the crystals together. Finally, the compacted snow is pressed into clear blue ice. Exactly how ice …

A disease of the gums which starts round the arcs where the gums meet the teeth. The gums swell and became tender. It can be treated.

In winter, all of us warm water in the geysers in the bathroom for bathing. Nature too has geysers which throw up a huge amount of hot water and steam. The ‘Old Faithful’, as one of the geysers in the Yellow Stone National Park in the United States of America is called, spews out boiling water at intervals of 33 …

The random changes in gene frequencies occurring by chance and not under the control of natural selection are called genetic drift or random genetic drift or sampling error. This theory was advocated by geneticist Sewall Wright in 1930. It explains the change in gene frequency. It is caused due to sampling error. A new generation arises from a sample of …

Gene doping involves modifying an athlete’s DNA, or having him inject or inhale foreign DNA, to make him bigger, stronger and faster. It’s harder to detect than most drugs, which makes it all the more desired by cheaters looking to prosper. It is suspected that gene doping is already happening and is being done unethically and with immature technology, thereby, …

In chemical factories, oil refineries, oil wells, rigs and landfills, gaseous waste products and sometimes even non-waste gases produced are routed to an elevated vertical chimney called a gas flare and burnt off at its tip. This is called gas flaring. Waste gases are subjected to such a process either because the gases are waste or it is difficult to …

Fleur-de-lis (or fleur-de-lys) is a stylized lily (in French, fleur means flower, and lis means lily) or iris that is used as a decorative design or symbol. It may be “political, dynastic, artistic, emblematic, and symbolic”, especially in heraldry. While the fleur-de-lis has appeared on countless European coats of arms and flags over the centuries, it is particularly associated with …

It’s that happy, eager feeling of looking forward to something that’s about to happen. You can feel excited because something you like is going to happen, or because something new is going happen and you don’t know what to expect.

ESP means Extra Sensory Perception. Regular sensory perception is the way we see the world through our five senses – sight, hearing, smell, taste and touch. But “extra” goes beyond into the realm of seeing the unseen. That could looking through walls, hearing the voices of dead people, or getting a strong feeling about something that is going to happen …

Natural forces are constantly changing our world. Some rocks are dissolved by rainwater and others are split by frost or rapid temperature changes. Worn rock is then carried away by running water, glaciers and, in dry regions, by the wind. Weathering, running water, glaciers and winds are all forces of erosion. Natural erosion is slow. For example, it takes 30,000 …