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2221.The body system that controls and coordinates for the function of all other organ systems is called ____?
2222.Which statement is incorrect about chemical reactions? States of matter does not change during chemical reactions, Chemical reactions produce new substances, Chemical reactions occur with the absorption or emission of energy, Chemical reactions may be fast, moderate or slow
2223.Ozone layer protect us from the harmful _______ of the Sun.
2224.Which one among the following is not a chemical change? Melting of ice, Burning of fuel, Explosion of firework, Cooking raw food
2225.In a concave mirror, the image size depends upon _____?
2226.Vector quantities have _____ along with magnitude and unit.
2227.Which one is a vector quantity? Mass ,Weight, Time, Temperature
2228.Solution is a mixture of ______?
2229.A type of simple machine which used to move heavy objects up or down over a vertical height is known as _____?
2230.Mental retardation in children is mainly caused by the deficiency of?