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DALAUDA PUBLIC SCHOOL, DALAUDA, Final Examination 2021-22, CLASS:-VII, SUBJECT:-SCIENCE, , TIME:-3:00hrs, MM:-80, , Q.1 multiple choice questions:, 1x10=10, i. The blood cells which transport oxygen from lungs to the organs are:, a) Platelets, b) RBCs, c) WBCs, d) Plasma, ii., Pollen grains are formed in:, a) Anther, b) Pistil, c) Sepals, d) Petals, iii., Which of the following is a unit of time?, a) Second, b) Sunrise, c) Dusk, d) Full moon day, iv. A material which does not allow electric current to pass through it is:, a) AlNiCo, b) Wood, c) Tungsten, d) Nichrome, v. Eutrophication results in:, a) Deficiency of oxygen in ponds, b) Increase in oxygen level of water, c) Increase in carbon dioxide level in water, d) Decrease in carbon dioxide level in water, vi. Industrial affluent is wastewater generated from:, a) Bathrooms, b) Toilets, c) Industries, d) Mines, vii., Bacteria and fungi act as:, a) Omnivores, b) Herbivores, c) Carnivores, d) Decomposers, viii., Which of the following mirrors you can use to see your face to dress up?, a) Cylindrical, b) Concave, c) Plane, d) Convex, ix. The name ‘Typhoon’ has been given in Japan to:, a) Tornado, b) Hurricane, c) Cyclone, d) Tsunami, x. Microorganisms act upon dead organisms to produce:, a) Wood, b) Leaves, c) Humus, d) Bone charcoal, Q.2 Match the following:, 1x5=5, ‘A’, ‘B’, i. A plane mirror, a. Earth going round the sun, ii., Linear motion, b. Motion of pendulum, iii., A convex lens, c. Strait line motion, iv. A concave lens, d. A looking glass, v. Circular revolving motion, e. A magnifying glass, f. Strait line motion, g. To view distant objects clearly, (i-d, ii-f, iii-e , iv-g ,v- a), Q.3 State whether 'true' or 'false':, 1x5=5, i. Shadow of an object is formed in direction opposite to the source of light. T, ii., Moving air is called wind. T, iii., Anthers on stamens bear female gamete. F, iv. The flowers bearing both the stamen and pistil are called bisexual flowers T, v. Bees and butterflies help in cross pollination in flowers. T, Q. 4 Fill in the blanks:, 1x5=5, i. Moving air is called__________. (Wind), ii., Water collected as a lake under the ground is termed as__________. (Water table), iii., Exploding sound produced during lightning on the clouds is called_________. (Thunder), iv. An electromagnet uses__________ effect of electricity. (Magnetic), v. The chambers of the heart which pump blood to the lungs and the body are called________., (Ventricle), Q.5 Give answer in one word:, 1x10=10, 1

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i., ii., iii., iv., v., vi., vii., viii., ix., x., Q.6, i., ii., iii., Q.7, i., ii., Q.8, , Clean water fit for drinking. (Potable), Wet winds blowing from over the sea towards land and bringing rain. (Monsoon), Water falling from the clouds. (Rain), Shape of the wings on an airplane. (Aerofoil), A simple device used to ‘close’ or ‘open’ a circuit. (Switch), A insulated wire. (Cable), The distance covered by a body in a unit time. (Speed), The process which helps helps in production of new ones similar to the parents. (Reproduction), Blood vessels which carry blood from the heart to an organ. (Artery), Rainwater which remains on the soil and is collected in ponds. (Surface water), Strike out the wrong word from the following:, 1x3=3, A fuse is an application of heating/magnetic effect of current., A bulb gets lighted when the circuit is closed/ open., Nichrome alloy of metals melts/does not melt at high temperature., Give reason for the following:, 1x2=2, Chilies kept in vinegar in a cylindrical jar appear to be enlarged., Rainbow is not formed during noon., Explain the following term: (Any 5), 2x5=10, i., Sewage, ii., Flora, iii., Groundwater, iv., A prism, v., Parthenocarpic fruit, vi., Binary fission, , Q.9, i., ii., iii., iv., v., vi., Q. 10, i., ii., iii., iv., v., , Short answer type questions: (Any 5), 3x5=15, What is blood? Explain its composition., What is gale?, Differentiate between uniform and non uniform motion., What are pollinators? Name them., What is electromagnetism and who discovered it?, What is monsoon?, Long answer type questions :(Any 3), 5x3=15, How is Holy River Ganga being polluted?, Describe the structure and working of an electric bell., Explain the parts of a flower with the help of a well labelled diagram. Explain the importance of, fertilization., Draw a labelled diagram of Human Heart., Study the picture and choose the correct stages in the treatment of wastewater., Settling tank, Water bodies, Shedder cum aeration tank, Air dried sludge, Solid waste collected from homes and factories, Screening, Digester, Removal of grit and pebbles, , ********* BEST OF, , LUCK********, 2