Which of the following is not one of the air pollutants?, carbon dioxide, nitrogen, nitrogen oxide, sulphur dioxide, pollen, sand and dust, Which gas leads to the depletion of ozone layer?, carbon dioxide, chlorofluorocarbons, Smoke, carbon monoxide, Which is NOT the effect of the thinning of ozone layer?, The plants growth is affected, Reduce the formation of forest, Greater risk of skin cancer and cataracts, the Earth's temperature rises, Which of the following is NOT correctly matched?, light energy, electrical energy, kinetic energy, potential energy, Mechanical energy = ?, kinetic energy + electrical energy, Light energy + chemical energy, potential energy + kinetic energy, potential energy + chemical energy, Which is not true about this tool?, This belongs to third class lever., This tool saves distance, waste effort., It has longer effort arm than load arm., Stapler is another example of the same lever class., Which of the following is NOT an example of wedge?, axe, shovel, bottle lid, spanner, What are the two simple machines are used here?, lever, pulley, inclined plane, wheel and axle, Which is not true about third class lever?, More effort to do work., It has longer load arm compared to effort arm., Wheelbarrow is one of the examples., It can save distance., At point 3 , the pendulum has, zero kinetic energy, maximum kinetic energy, decreasing potential energy, highest potential energy, The objects in the diagram possesses, Gravitational potential energy, kinetic energy, elastic potential energy, chemical energy, Pressure increase when, liquid depth decreases, pressing force decreases, base area increases, the density of liquid increases, Which of the following is not true?, Air pressure at higher altitude is lower., Air pressure increases as the altitude decreases., Standard atmospheric pressure means the atmospheric pressure at top of the mountain., The air is thinner at higher altitude., Which is not a decomposer?, earthworm, fungi, bacteria, mosses, Which of the following is the ultimate source of energy?, green plants, consumers, sun, decomposer, The diagram shows a/an, population, community, ecosystem, biosphere, What are the groups of population found here?, crocodile and bird, lion and zebra, duck and lotus, fish and dolphin, How many trophic levels in this food chain?, 2, 3, 4, 5, Which of the groups are in competition?, frog and rabbit, bird and snake, deer and fox, snake and fox, How many food chains are found?, 7, 6, 5, 4, What is the interaction between the organisms?, Interspecific competition, intraspecific competition, mutualism, predation, Which of the following is NOT an example of warning coloration?, owl, octopus, snake, skunk, Which of the following has the same interaction as the diagram?, lions, tiger and deer, mites on animal skin, flower and bees, Which of the following is true?, There are 2 producers., There are 3 primary consumers., there is no tertiary consumer., There are altogether 8 food chains., Which is true?, the volume of the air increases, The air pressure decreases, The air particles are more compact and higher pressure., The space between particles increases, Work is, force per unit area, distance per unit time, the product of force and displacement in the direction of force, work done per unit time, SI unit for Power is, Newton, Joule, Watt, Pascal, A force of 15N is needed to push a block of wood through a distance of 5m. How much work is done?, 30J, 50J, 75J, 100J, Vasmin weighs 48kg takes 12 seconds to run up of a stairs with height 10m above the ground. How much is Vasmin's weight?, 40 W, 480N, 400W, 48 N, Vasmin weighs 48kg takes 12 seconds to run up of a stairs with height 10m above the ground. How much is Vasmin's power?, 40W, 48 N, 400 W, 480N, What is the minimum effort to lift the load of 100N?, 100N, 50N, 25N, 20N, If a force of 300N is used to lift the load, find the weight of the load., 50N, 60N, 100N, 150N, This belongs to which class of lever?, First class lever, second class lever, third class lever, too little information to determine, Which of the following have the same class of lever?, wheelbarrow, fishing rod, seesaw, tongs, The following are third class lever except, stapler, boat paddle, tweezer, nut cracker

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