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Sant Atulanand Convent School, Half Yearly Examination: 2021-202, , , , Class — VII, Science, (SET-1), Time: MM: 20marks, General Instructions:, , All questions are compulsory. All questions carry equal marks (1 mark), , re yi ci option:(i) Substratum is also called as(a) D-Horizon (b) B-Horizon (c) A-Horizon, (ii) The layer of air surrounding earth is called, (a) Atmosphere (b) Cyclone (c) Space, , (iii) Tracheae are present in a/an,, , (a) Frog (b) Fish (c) Earth warm, (iv) The smallest particles of soil are called, (a) Clay (b) Sand (ce) Silt, , (v) The device measures wind speed is(a) Wind gauge (b) speedometer (c) Hygrometer, , (vi) Alcohol is formed in, (a) Aerobic (b) Anaerobic (c) Cellular, (vii) Bile juice is stored in, (a) Liver (b) Gall bladder (c) Kidney, (viii) Humidity is the measure of present in air., (a) Temperature (b) pressure (c) moisture, , (ix) The Disease caused by bacteria in woolen industry is(a) Anthrax (b) Scurvy (c) Goiter, , (d) C-Horizon, , (d) Storm, , (d) Insects, , (d) Gravel, , (d) Anemometer, , (d) leaf, , (d) Pancreas, , (d) wind, , (d) Anaemia

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(x) A new substance is formed in, (a) Melting (b) Sublimation (c) Evaporation (d) Burning, (xi) The acid present in Vinegar is, (a) Lactic acid (b) Acetic acid (c) Citric acid (d) Formic acid, (xii) the normal temperature of a healthy human body is, (a) 30°C (b) 35°C (c) 40°C (a) 37°C, , (xiii) The digestive juice present in saliva acts on, (a) Starch (b) Proteins (c) Fats (d) Carbohydrates, , (xiv) Mode of taking food by an organism and it's utilization by the body is, called(a) Absorption (b) Nutrition {c) Assimilation (d) Digestion, , (xv) The SI unit of temperature is , (a) Joule (b) centigrade (c) meter (d) Kelvin, (xvi) Cooking utensils are generally made up of, (a) Wood (b) Plastics (c) Stainless steel (d) Glass, (xvii) .Acidic solutions turn blue litmus paper to, , (a) Red (b) Blue (c) Yellow (d) Pink, (xviii) The region of low pressure inside a cyclone is called, (a) Typhoon (b) Eye (c) Centre (d) Coil, (xix) The__ solution turns pink china rose, indicator dark pink, (a) Acidic (b) Basic (c) Neutral (d) None, (xx) The SI unit of heat is, (a) Joule (b) centigrade (c) meter (d) Kelvin, , FERRAEEAFSSALEERRAREEEE SS