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Science is the study of the natural world based on facts learned through experiments and observation.Given below are some questions to test your scientific knowledge. Tick (3) the correct answer. 1.A chemical reaction in which a substance combines with oxygen and gives off heat and light is referred to asa. Electronb. Combustionc. Current2.Anything that can act on a stationary body and make it move is calleda. Forceb. Evaporationc. Cathode3.A material that is composed of more than one metal like brass which contains copper and zinc is calleda. Batteryb. Evaporationc. Alloy4.Flow of electrons along a conductor is termed asa. Evaporationb. Electric Currentc. Battery5.The negatively charged sub-atomic particle is calleda. Atomb. Forcec. Electron6.Capacity for doing work is calleda. Combustionb. Energyc. Alloy7.A phenomenon in which liquid turns into vapour at room temperature is calleda. Evaporationb. Atomc. Battery8.The smallest part of an element that can take part in a chemical reaction isa. Alloyb. Atomc. Energy9.A device that converts chemical energy into electrical energy isa. Batteryb. Currentc. Atom10.A negative electrode through which an electric current leaves an electrolytic cell isa. Electronb. Alloyc. Cathode23Very ScientificA metal which is a part of our blood and makes it red is Iron.File-O-FactWhich device is used to measure electric current?................................................34