Practical Skills in Science & Technology-IX
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1. To prepare
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2. To prepare
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3. To carry out the following chemical reactions and record observations. Also to identify the type of reaction involved in each case
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4. To determine the density of a solid(denser than water) by using a spring balance and a measuring cylinder
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5. To establish the relation between the loss in weight of a solid when fully immersed in i0water ii) kerosene, with the weight of liquid displaced by it taking at least two different solids.
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6. To study the relation in limiting friction between blocks of different masses and surfaces of different nature
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7. To measure the temperature of hot water as it cools and plot a temperature time graph
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8. To study the relation in the time period (T) of a simple pendulum with its lenght(L) and to plot L-T2 graph
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9. To prepare stained temporaty mounts of a) onion peel, and b)human cheek cells, and to record observations and draw their labelled diagrams
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10. To identify parenchyma and sclerenchyma tissues in plants, striped muscle fibres and nerve cells in animals, from prepared slides and to draw their labelled diagrams
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11. To prepare methane gas by heating sodium acetate and soda lime and study its physical properties, i.e.colour, odour, solubility in water and its chemical properties like combustion and action on bromine water and alkaline potassium permanganate soluti
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12. To identify the saturated and unsaturated organic compounds out of the following:
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13. To test a) the presence of starch in a given food sample, and b) the presence of the adulterant metanil yellow in dal
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14. To study the adaptive features of xerophytes such as cactus and hydrophytes such as water lily/lotus. to draw labelled diagrams and record observations
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15. To observe and draw the given specimens earthworms. cockroach, bony fish and bird. For each specimen to record
