Science one liners

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The heat-resistant variety of glass is _____ glass. — Pyrex The synthetic fibre that is known as artificial silk is _____. — Rayon In the process of vulcanization, natural rubber is heated with _____. — Sulphur Bagasse, a by-product of the sugar manufacturing industry, is used in the manufacture of ______. — Paper The first synthetic fibre made by the human was _____. — Nylon Sensitive instruments can be shielded from external magnetic effects by surrounding them with a _____ shield. — Brass A mixture of water and alcohol can be separated by _______. — Distillation Ordinary cooking oil can be converted into vegetable ghee by the process of ______. — Hydrogenation Light energy gets converted into chemical energy in the process of ______. — Photosynthesis A substance that readily changes into vapour without need of heating is said to be highly _____. — Volatile The final products of combustion of ethane are ______ and water. — Carbon doixide The process by which an organic compound breaks down into simpler compounds on heating to high temperatures is known as ______. — Pyrolysis The hydrometer is an instrument used to measure _____ of liquids. — Specific gravity The kilohertz is a unit that measures the ____ radiowave frequencies. — electromagnetic

A ringing bell cannot be heard on the surface of moon. Why? — The moon does not have any atmosphere to propagate sound waves. What is ballistics? — It is the science of projectiles. Give one element which is used in making semiconductor devices. — Germanium. Name the instrument used to measure radioactivity. — Geiger Counter.

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What is “Electrum”? — It is a natural alloy of gold and silver. (55% to 85%) What is “metrology”? — It is the scientific study of weights and measures. The filament of an electric bulb is made of ________ — Tungsten Water has maximum density at _______ (temperature) — 4° C The chemical formula of Plaster of Paris may be given as ______. — CaSO4,2H2O The element most abundantly found in the earth’s crust is ______. — Aluminium The form of phosphorus used in making safety matches is ______. — Red phosphorus The element present in the largest amount in rocks and minerals is ______. — Silicon The purest form of iron is called _____. — Wrought iron An alloy that finds use in making heating elements for electric heating devices is _____. — Nichrome Water is a good solvent of ionic salts because it has a high ____ moment. — dipole A superconductor is characterised by ____ permeability. — Zero The main constituents of pearls are calcium carbonate and _____. — Magnesium carbonate Mesons are found in ____ rays. — Cosmic The age of ancient geological formations is generally estimated by the _____ method. — Carbon dating The ____ is employed as a moderator in a nuclear reactor. — Graphite Amalgams are alloys that contain ____ as one of the constituents. — mercury The property of a substance to absorb moisture from the air on exposure is called _____. — Deliquescence The element that is obtained from sea weeds is _____. — Iodine Radioactive disintegration of uranium ultimately results in the formation of _____. — Lead


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Radioactive pollutant had been in the news, owing to its occurrence in building materials is ______. — Thorium _____ is positively charged particles emitted by radioactive elements? — Alpha rays The dynamo is a device used for converting ____ energy into ____ energy. — Mechanical; electrical The jet plane engine works on the principle of _____ momentum. — Linear A sailor in a submarine can see objects on the surface of the sea with the help of a ______ — Periscope The device that separates light into its component wavelengths is the _____. — Interferometer The working of the quartz cyrstal in the watch is based on the _____ effect. — Piezo Thermo-couple is used to convert heat energy into ______ energy. — electrical ______ occurs due to elongation of the eye balls. — Shortsightedness People have eyes of different colours e.g. brown, black or blue, depending upon the particular pigment present in the ____. — Iris The biological death of a patient means death of tissues of the _____. — Brain The membrane that protects the developing embryo from desiccation is _____. — Amnion The unit of classification of plants and animals is _____. — Species The pH of human blood is between _____. — 7.5-8 A person suffering from protanopia or colourblindness, has difficulty in distinguishing between the _____ and ____ colours. — green; red The clotting of blood vessels is called _____. — thrombosis The life of an RBC (red blood corpuscle) in the human blood is approxi mately ____ days. — 120 The RBCs (red blood corpuscles) are formed in the _____. — bone marrow The ‘graveyard of RBCs’ would refer to the ____. — spleen The gland in the human body popularly called the ‘Adam’s apple’ is the ____ gland. — thyroid


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The _____ produces the cortisone hormone in humans. — adrenal The saliva that is excreted by the salivary glands contains an enzyme called ____. — ptyalin When the lens of the eyes becomes foggy, the disease indicated is ______. — Cataract The blood pressure in humans is connected with the _____ gland. — Adrenal The human skin layer is rendered impervious to water by ______. — Keratin The image formed on the retina of the eye is _______ and inverted. — real The rate of metabolism is directly regulated by the ____ gland. — thyroid _____ hours food takes in a normal human being to reach the end of the intestine for complete absorption. — 12 The form of heart disease characterised by an inadequate supply of blood to the heart is known as _____. — Angina A person suffering from ______ would be advised to wear cylindrical glasses. — Astigmatism The colour of the skin is due to the presence of a substance called ______. — Melanin The inspection and dissection of a human body after death is called ____. — Autopsy Veins differ from arteries primarily in their ____ to control the direction of flow. — Valves Impure blood from all parts of the body enters the heart through the ____. — Right auricle The development of sex organs in humans is controlled by the ____ gland. — Pituitary The human skull comprises ____ bones. — 5 What does the ‘funny bone’ refer to a _____. — nerve The element present in the largest amount in the human body is ____. — Oxygen _____ is the diploid number of chromosomes in the human body. — 46 From _____ stage of the silkmoth silk is obtained. — Cocoon


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______ is used in the manufacture of bread because of its ability to produce CO2 . — Yeast The bats are able to fly in the dark because their wings produce _____. — Ultrasonic waves The ant can see the objects all around it due to the presence of _____ eyes. — Compound The only snake that builds a nest is the _____. — King cobra The organs that perform the same function, while being morphologically different, are called _____ organs. — Analogous With a rise in temperature, the speed of sound _____. — Increases From which part of the plant is turmeric obtained? — Stem A substance that can act both as an acid and a base is known as ____. — Amphoteric Cyanide acts as a poison by directly affecting the ____ and respiratory system. — Cardiac Drugs used for relieving pain is called _____. — Analgesics Epilepsy is a disease of the ____ system. — Nervous The disease that is characterized by an inflammation of the membranes covering the brain and spinal cord is _____. — Meningitis Amnesia is related to the loss of ______. — Memory A cricket ball will get thrown to the maximum distance, if it is flung at an angle of _____. — 45° The X-ray can be employed as a means of treatment in the case of ____ diseases. — Cancerous The Blight disease of potato can be cured by _______. — Bordeaux mixture The cotton fibre is extracted from the _____ of the plant. — Seed The cell organelle that functions as the powerhouse of a living cell is______. — Mitochondria The metal whose ion is involved in stomatal regulation in plants is _______. — Potassium Animal semen for the breeding of animals remains fertile for a long time at _____ temperature. — -196° C Pulse crops are able to fix atmospheric nitrogen owing to their _____. — Root nodules


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The plastids that make the flowers and fruits conspicuous to animals, for the purposes of pollination and dispersal, are _____. — Chromoplasts The part of the cell that is essential for the synthesis of protein is _____. — Ribosome Herbicides are the usual method employed for the elimination of _____. — Weeds For safe storage to be ensured, the moisture content of foodgrain at the time of harvesting should not be higher than _____ per cent. — 14% The preservative used in tomato sauce is sodium — Benzoate The presence of _____ makes cork cells impervious to water. — Suberin Who was the scientist who had first recognized and named the nucleus? — Robert Brown _______ are tumour-inducing genes. — Oncogenes What fraction of the total sun’s rays reaching the earth is used up by the plants in the process of photosynthesis is _____ per cent. — 1% The term used to denote several individuals of a species living together in a locality is _____. — Biocommunity The ten per cent law pertaining to the transfer of energy in a food chain had been given by _____. — Kindemanns For plant metabolism, sulphur, calcium and magnesium constitute _____. — Macronutrients Nitrogen fixation is performed by ____ algae. — Blue-green Cross-pollination, the process of deposition of pollen on the stigma of another, is called ______. — Allogamy Biodegradable water may normally be converted into useful substances with the help of _____. — Bacteria Nutrients get recycled in the atmosphere with the help of certain microorganisms called _____. — Decomposers The species to which humans belong is ____. — Homo sapiens Life is believed to have appeared to earth about ____ billion year ago. — 3.6 Compared with the human chromosome number of 46, the chimpanzee, gorilla and orangutan have _____ chromosome. — 48


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The evolution of the human species took place mainly in the continent of ______. — Africa The telegraphic code had been developed by ____. — Samuel Morse The laws of electrolysis had been propounded by ____. — Faraday The Indian scientists who is identified with the measurement of plant growth is _____. — Meghnad Saha The recipient of the Nobel Prize for the development of wireless telegraphy was ______. — Marconi Ornithology is the study of _____. — Birds Gun powder had been invented by _____. — Roger Bacon What is the study of life in outer space called _____. — Exobiology Entomology refers to the study of ________. — Insects The average salt content of sea water is ______ per cent. — 3.5% Dr Hargobind Khurana is credited with the discovery of the synthesis of _____. — Genes Petrology refers to the study of the ______ in the earth’s crust. — Rocks The transistor had been invented by _____. — Shockley A person standing in front of a mirror, upon finding that his image is larger than himself may conclude that the mirror is _____. — Concave The time period of a pendulum, when taken to the moon, would _____. — Increase When cream is separated from milk, the density of milk _____. — Increases In a lamp, oil rises up the wick because of the _______. — capillary action Cream gets separated from milk being churned due to ____ force. — Centrifugal Burns caused by steam are much more severe than those caused by even boiling water because steam contains ____ heat. — latent The sitting sun looks oval in shape because of _____ of the sun rays. — Refraction A shaving blade, when placed gently on water, floats because of _____. — Surface tension


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If the same force a acts upon two bodies, one heavy and one light, for the same time, then both the bodies acquire the same ______. — Momentum When the speed of a body is doubled, its kinetic energy becomes _____. — Quadrupled A person climbing a hill bends forward in an attempt to increase _____. — stability The science dealing with the study of phenomena at very low temperatures is known as _____. — Cyrogenics The part of the sun that is visible during total solar eclipse is called ______. — Corona The technique of recording and reproducing tridimensional images of object is called ______. — Holography The device used for measuring the depth of the sea is called ____. — Fathometer Residential houses generally get 220 V AC. The value 220 represents ____ voltage. — Effective Radiocarbon dating is a technique used to estimate the age of fossils. To estimate the age of the earth, one would employ _____ dating — Uranium dating Pollination by insects is called _____. — Ontomophily The organ whose malfunctioning results in jaundice, and to which excessive consumption of alcoholic drinks causes damage, is the _____. — Liver The worm that enters the intestine by penetrating the skin is _____. — Hookworm The phenomenon of ‘red snow’ in some arctic and alpine areas occurs due to growth of a/an ____. — algae The phenomenon of some plants developing fruits without fertilization is called _____. — Parthenocarpy A ______ is a substance that increases the speed of reaction. — catalyst ‘Gobar gas’ contains in a predominant proportion ______. — Methane Natural rubber is made strong and bouncy by adding to it ______. — Sulphur


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The smallest possible unit of a chemical compound is ______. — Molecule The phenomenon involved in the process of dialysis, used on patients with affected kidneys, is _______. — Osmosis The most abundant element in the human body is _______. — Oxygen The particles that display a dual nature of being both particles and waves are _____. — Electrons In the earth’s crust, aluminium is found as _______. — Bauxite The liquid used as the refrigerant in refrigerators is ______. — Liquid ammonia The substance that the body usually loses during dehydration is ______. — Sodium chloride The National Chemical Laboratory is situated in _______. — Pune A medicinal substance given to prevent a disease, or against the intake of poisons is called _____. — Antidote The compound used in anti-malarial drugs is ______. — Chloroquin Carbon, graphite and diamond are together called _____. — Allotropes The metal among the following that pollutes the air of a big city is _____. — Lead The type of glass is used in making lenses and prisms is _____. — Flint glass The catalytic properties of a substance may be best defined as a phenomenon of _____. — Adsorption The unit for measuring the pitch of frequency of sound is ______. — Decibel The nautical mile is a unit of distance used in _____. — Navigation In an engine run on diesel, ignition is caused through _____. — Compression The component of an electronic watch that corresponds to the pendulum of a pendulum clock is the ______. — Crystal oscillator Reflex actions are a function of the autonomous ______ system.


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— Nervous Oil from the germanium plant, used in making perfumes, is extracted from its ______. — Stems The organ in the human body that accumulates iodine is the _____ gland. — Thyroid The sugar that is present in considerable amount in the blood is _____. — Glucose The maximum temperature that the human skin can tolerate without getting blisters is ______. — 40° C The strongest of all muscles in the human body is the ______ muscles. — Thigh

The chromosomal abnormalities present in unborn child (while still in his mother’s womb) may be found by a technique called ______. — Amniocentesis. Water that contains calcium and magnesium is called _________ water. — Hard. Mycology refers to study of ______. — Fungi. The normal speed of sound is _______. — 332 m/sec. The double Helix structure of DNA molecule had been proposed by _______ and ______. — Watson, Kirck. Light waves are ______ in nature. — electromagnetic. _______ techniques can be used to establish the paternity of child. — DNA finger printing. Soap is prepared by boiling causative soda with ______. — fats. The greenish-yellow colour seen on the hard boiled egg is due to the formation of ______. — Hydrogen Sulphide. Camel uses its hump for storing ______. — fats The virus of AIDS affects the growth of _______ in blood. — T-cells The chemical employed as a fixer in photography is ______. — Sodium Thiosulphate Kilowatt is a unit of _______. — Power Tape of tape recorder is coated with _______. — Ferromagnetic powder. Name at least four human diseases caused by viruses.


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— Chicken pox , measles, rabies and poliomyelitismall-pox had been eliminated from the planet earth. Give the names of five hormone-producing glands-present in the human body. — Thyroid, Pituitary, Suprarenal, Pancreas and Testis. In which year was small-pox eradicated? — In May 1980, WHO formally announced that small-pox had been eliminated from the planet earth. Second largest human organ. — Liver The weight of copper contained in the average human brain: — 6 mg Human face has ________ bones — 14 Who held more than 1300 patents for his inventions? — Thomas Alva Edison What is the drug used to increase the output of urine? — diuretic The hardest natural substance — Diamond The two elements that give water a salty taste — Sodium and Chloride Yellow fever is a disease carried by: — mosquitoes What regulates the amount of glucose in blood? — Insulin How many adrenal glands are there? — Two Electricity flows from (negative to positive/positive to negative) — negative to positive _______ is the natural sugar in the milk. — Lactose Hereditary diseases such as haemophilia are caused by defective _______. — genes The life expectancy of a blue whale? — 90 years The number of wings on a housefly? — Two pairs (4 wings) Cats spend _____ hours asleep a day. — 16 A kilowatt is 1000 watts. What about a megawatt? — 1,000,000 watts Give the common name for iron oxide. — Rust What is the common name for ‘rubella’ — German measles How long does our body take to digest an apple? — About an hour and a half


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German silver is an alloy of copper, zinc and _____. — nickel Monazite is an ore of _______. — Thorium Old written material, that cannot be read easily, can be read by ________ rays. — Infrared Chronometer measures ________. — Time Very small intervals of time can be accurately measured by _______. — Atomic clocks The electrolyte in an ordinary dry cell is ______. — Ammonium chroride A foreign particle that stimulates the formation of antibodies is called a/ an ______. — Antigen In humans the body temperature is regulated by the ____ gland. — Hypothalamus The function of the tongue in snakes is to _____ the food. — Smell In the skin of which area have maximum density of sweat glands ______. — Armpits An enzyme that works in an acidic medium is _______. — Pepsin Plants utilize nitrogen in the form of _____. — Nitrate A deficiency of iron in the diet causes ______. — Anaemia The healing of wounds can be hastened by vitamin ______. — K Wilson’s disease is caused by an excess in the human body of _____. — Copper Vitamin B-complex represents a group of __________ vitamins. — 11 The specific test for the detection of tuberculosis is the _____ test. — Mantoux’s Transfer of genetic information from one generation to the other is accomplished by the ______. — DNA The study of the relation of plants and animals to their surroundings is called _______. — Ecology ‘Origin of Species’ is a path breaking book written by ______. — Charles Darwin. The complete conversion of glucose in the presence of oxygen into carbon dioxide and water, with release of energy is called ______. — Aerobic respiration


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Ergotism is caused due to consumption of ________. — Contaminated grains. The unit for measuring the distance of stars from the earth is _____. — Light year The science of growing grapes in the Mediterranean region is called ______. — Viticulture. The major chemical compound found in human kidney stones is ______. — Calcium Oxalate. One astronomical unit is the average distance between the earth and the _____. — Sun Unit of electric current is ______. — Ampere. The water content in cow’s milk is approximately _____ per cent. — 80% Yeast is a good source of vitamin _____. — B complex. The spherical shape of small drop of rain is due to ________. — Surface Tension The metal that is generally mixed with gold to make ornaments is _______. — Copper The SIM card is used in _______. — Cellular Phones. At _________ temperature all molecular motion ceases. — Absolute zero/-273° K.


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Science one liners