General Knowledge
Ans : A hygrometer is one of the instruments used to measure the moisture in the air.
Ans : Chlorophyll.
Ans : They are all Marsupials, i.e. they carry their young ones in pouches.
Ans : The Ibex is a mountain goat. It was close to extinction in the Alps. It is now under Government protection. In India Ibex is found at high altitudes in Kashmir.
Ans : Henry Bacquerel
Ans : Hydrochloric Acid
Ans : Dr.Charles H.Townes
Ans : Valentina Tereshkova.
Ans : Joseph Priestley.
Ans : Michael Faraday.
Ans : 14 million degrees C.
Ans : Vikram Sarabhai space Centre
Ans : When tigers become old or are incapacitated because of injury, they prey on human beings. A tiger that has preyed on man and has tasted human flesh often continues to prey on man.
Ans : A refracting telescope is made by using two lenses, both of which are convex.
Ans : Porpoises are smaller than dolphins and they do not have beak like snouts of dolphins. Porpoises live in the shallow water of ocean bays and the mouths of rivers, while dolphins live out in the deeper waters.
Ans : Thomas Alva Edison.
Ans : Unlike human beings, whose growth stops around 20 years, snakes keep on growing. This becomes possible because they keep casting off old skin and develop new skin, when the old one is shed.
Ans : Sodium Bicarbonate.
Ans : Samuel Hahnemann.
Ans : It bounces off ultraviolet radiation.
Ans : The Arabian camel (or dromedary) has only one hump, while the Bactrian camel has two humps.
Ans : The process of hardening rubber by adding sulphur and heating the mixture is vulcanisation. Vulcanisation was discovered by Charles Goodyear. Raw rubber is sticky. It hardens when the temperature is low and softens when it is high. Charles Goodyear discovered that by combining raw rubber with sulphur and by heating it, the rubber becomes stronger and elastic and also resistant to solvents. Today almost all rubber, whether natural or synthetic is vulcanized.
Ans : Concrete is a rock like substance made from cement, natural sand, stone and water. Cement and water react chemically and serve like glue to bond the stones and form a hardened mass. When the material is still in a "plastic state" it can be very easily formed into various shapes. But once the concrete sets (hardens) no changes can be made.
Ans : Chronobiology
Ans : Indian National Satellite
Ans : Bamboo shoots and leaves.
Ans : If a ball is whirled at the end of a string in a circular motion, it would seem as if the ball were suddenly very heavy and pulling harder as it is whirled faster. The force of the string pulling the ball toward the centre is the centripetal force. There is an outward force on the string by the ball. This outward force is the centrifugal force.
Ans : ntroduction of germs into a body to precipitate a mild form of a disease. As a result antibodies are produced, which protect the body from the invading germs.
Ans : Petrified Forest.
Ans : Electrolysis is the decomposition of a substance using electricity. For example when table salt is subjected to electrolysis, it turns into sodium and chlorine.
Ans : Anders John Angstrom
Ans : He was a Greek Philosopher and mathematician who lived around 520 BC.
Ans : Fishes
Ans : Phototropism.
Ans : Iron.
Ans : Parthenocarpic
Ans : Plant life
Ans : Gynophobia
Ans : Trees that shed leaves in autumn are called deciduous trees.
Ans : They cannot curl their toes. As a result they cannot have a firm grip on a branch.
Ans : Parachute is nothing but a big umbrella made of a special fabric. The parachute and the person using it are subject to two forces: - 1) gravity, which brings them down and 2) the buoyant force of air, which pushes up the umbrella. If the force of the gravity is greater than the buoyancy, the parachute moves down, but very slowly. Hence men can reach the ground safely.
Ans : The Rann of Kutch.
Ans : Density of liquids.
Ans : Roots.
Ans : Palaeontology.
Ans : South American Electric Eel.
Ans : While experimenting with a glass tube from which the air had been pumped, Roentgen happened to pass an electric current through the tube. Nearby was a screen coated with Barium Platinocyanide. Suddenly he noticed that the screen was glowing with a greenish blue light. After experimenting with this radiation, coming from the evacuated glass tube Roentgen found that this radiation could pass through substances of varying densities placed between the tube and the screen. He named these rays X-rays.
Ans : Water Cycle is the story of a raindrop, which passes through other phases to become a raindrop again. In summer the water in lakes and rivers evaporates. This water vapour is warm and is pushed up by cold air. As the warm air moves upwards air currents develop. They are called winds. When the warm air passes over mountains or when it goes high up, it cools down and condenses to water again and falls down to earth. On the surface of the earth the raindrops may join other raindrops and if the earth cannot absorb this water quickly, they form streams and rivers. And the cycle continues.
Ans : Sir Humphry Davy.
Ans : Femur (in the thigh).
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