Exercise : Solutions of Questions on Page Number : 156 Q1 : Classify the following as motion along a straight line, circular oroscillatory motion: (i) Motion of your hands while running. (ii) Motion of a horse pulling a cart on a straight road. (iii) Motion of a child in a merry-go-round. (iv) Motion of a child on a see-saw. (v) Motion of the hammer of an electric bell. (vi) Motion of a train on a straight bridge. Answer : (i) Oscillatory motion While running, the hands move to and fro and repeat their motion after a given interval of…
Author: Admin
Exercise : Solutions of Questions on Page Number : 141 Q1 : Fill in the blanks: (a) Production of new individuals from the vegetative part of parent is called ________. (b) A flower may have either male or female reproductive parts. Such a flower is called _________. (c) The transfer of pollen grains from the anther to the stigma of the same or of another flower of the same kind is known as _________. (d) The fusion of male and female gametes is termed as __________. (e) Seed dispersal takes place by means of _________, _________ and _________. Answer :…
Exercise : Solutions of Questions on Page Number : 131 Q1 : Match structures given in Column I with functions given in Column II. Column I Column II (i) Stomata (a) Absorption of water (ii) Xylem (b) Transpiration (iii) Root hairs (c) Transport of food (iv) Phloem (d) Transport of water (e) Synthesis of carbohydrates Answer : Column I Column II (i) Stomata (b) Transpiration (ii) Xylem (d) Transport of water (iii) Root hairs (a) Absorption of water (iv) Phloem (c) Transport of food Q2 : Fill in the blanks. (i) The blood from the…
Exercise : Solutions of Questions on Page Number : 118 Q1 : Why does an athlete breathe faster and deeper than usual after finishing the race? Answer : An Athlete needs to supply extra energy to his muscle cells which have worked hard during running. For this, he breathes faster and deeper so that more oxygen is supplied to the cells. This speeds up the breakdown of food and as a result, more energy is released. Q2 :List the similarities and differences between aerobic and anaerobic respiration. Answer : Similarity between aerobic and anaerobic respiration: In both aerobic and anaerobic…
Exercise : Solutions of Questions on Page Number : 105 Q1 : Tick the most suitable answer in question 1 and 2. In addition to the rock particles, the soil contains (i) air and water (ii) water and plants (iii) minerals, organic matter, air and water (iv) water, air and plants Answer : In addition to the rock particles, the soil contains (i) air and water (ii) water and plants (iii) minerals, organic matter, air and water (correct) (iv) water, air and plants Q2 : The water holding capacity is the highest in (i) sandy soil (ii) clayey soil…
Exercise : Solutions of Questions on Page Number : 92 Q1 : Fill the missing word in the blank spaces in the following statements: (a) Wind is ________ air. (b) Winds are generated due to ________ heating on the earth. (c) Near the earth’s surface __warm__ air rises up whereas _______ air comes down. (d) Air moves from a region of __________pressure to a region of ________ pressure. Answer : (a) Wind is __moving__ air. (b) Winds are generated due to __uneven__ heating on the earth. (c) Near the earth’s surface __warm__ air rises up whereas __cold__ air comes down.…
Exercise : Solutions of Questions on Page Number : 77 Q1 : Name the elements that determine the weather of a place. Answer : The elements that determine the weather of a place are temperature, humidity, rainfall, and wind speed. Q2 : When are the maximum and minimum temperatures likely to occur during the day? Answer : The maximum temperature of the day occurs in the afternoon while the minimum temperature occurs early in the morning. Q3 : Fill in the blanks: (i) The average weather taken over a long time is called __________. (ii) A place receives very…
Exercise : Solutions of Questions on Page Number : 65 Q1 : Classify the changes involved in the following processes as physical or chemical changes: (a) Photosynthesis (b) Dissolving sugar in water (c) Burning of coal (d) Melting of wax (e) Beating aluminium to make aluminium foil (f) Digestion of food Answer : (a) Photosynthesis → Chemical change (b) Dissolving sugar in water → Physical change (c) Burning of coal → Chemical change (d) Melting of wax → Physical change (e) Beating aluminium to make aluminium foil → Physical change (f) Digestion of food → Chemical change Q2 :…
Exercise : Solutions of Questions on Page Number : 56 Q1 : State the differences between acids and bases. Answer : – Acids Bases (i) These are sour to taste. These are bitter to taste. (ii) Acids turn blue litmus red. Bases do not change the colour of blue litmus. (iii) Acids do not change the colour of red litmus. Bases turn red litmus blue. (iv) With china rose indicator, these give dark pink colour. Bases give green colour with china rose indicator. (v) Acids do not change the colour of turmeric indicator. Bases turn the colour of turmeric indicator…
Exercise : Solutions of Questions on Page Number : 45 Q1 : State similarities and differences between the laboratory thermometer andthe clinical thermometer. Answer : Similarities: (i) Both clinical and laboratory thermometers have long, narrow, uniform glass tubes. (ii) The bulbs of both the thermometers have mercury in them. Differences: (i) The temperature range of clinical thermometers is from 35°C to 42°C while that of laboratory thermometer is from -10°C to 110°C. (ii) Clinical thermometer is used to measure the temperature of a human body. However, laboratory thermometer cannot be used to measure the temperature of a human body.…