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Zydus School for Excellence Cycle Test: Science. Std: VI Total marks: 30 . . Date: 13.2.09 Sec Name Q.l. Choose the correct option: [4] (i) The underground stem a) Can carry out photosynthesis c) Produce fruit J b) Used to propagate the plant d) take part in pollination (ii) The parasitic roots which absorb food and water from the host are found in which of the following: a) Black pepper b) Sugarcane d) Dodder. c) Strawberry Hi) The outermost ring of the flower generally green in colour are known as: b) Petals a) Stamen. c) Sepals d) carpel iv) Respiration is a form of which take place at the body temperature a) Photosynthesis b) Humidity c) Rusting d) Combustion v) Exhaled air contains: ~ a) Nitrogen b) Oxygen c) Carbon di oxide d) Carbon monoxide. vi) Oxygen cycle is threatened by: a) Plantation of trees b) Deforestation c).Photosynthesis d) Respiration vii) When a magnet is broken we get: a) Single north pole b) single south pole c) 2 north poles d) none of the above. ~) .The chemical name of magnetite is: a) Lead oxide c) Sodium oxide b) Iron oxide d) copper oxide - -" _. ,.. , ,,- .- Q.2. Answer in one or two words: [5] a) The phenomenon of attracting iron and pointing in the north- south direction is called this. b) Magnets made of soft iron which can be easily magnetized but also get demagnetized easily is called: c) The major component of air is d) The reddish brown layer formed on an iron sheet left out in moist air e) The underground stem swollen with food found in turmeric, Q.3.Correct the following'statements: [5] - i) The tiny pores through which the leaves breathe are called the air holes. ii) The network of veins in the leaf is called foliage. Hi) Nitrogen is very reactive and combines with other substances easily. iv) Attraction is the surest test of magnetism v) A piece of wood is kept across the poles of a horse shoe magnet to retain its magnetism. ~ Q.4. Give reason for the following in one sentence: [3]' a) A magnet should not be hammered or heated. b) When. air is blown into a beaker containing lime water it turns milky. c) A potato is called a modified underground stem. : :J Q.5. Answer the following questions briefly: [2x3=6] a) What is the main function ofleaf! Or . Distinguish between Fibrous root and Tap root system. b) What is oxygen cycle? 'i c) Mention four uses of magnets. Q.6. Answer in detail: (Any 2) [2x3=6] a) How can we take care of magnets? Q' b) Even though carbon dioxide has a minuscule presence but it plays a vital role in the living world. Why? ~ -- ., ~ c) What are the characteristic of leaf! How are they classified? OR Explain the Nitrogen Cycle in nature. Q.7. Draw a neat labelled figure of a leaf [1] i'

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