3 Review(s)

Physics: 1.To verify the laws of reflection of sound, 2.To determine the density of a solid (denser than water) by using a spring balance and a measuring cylinder, 3.To establish the relation between the loss in weight of a solid when fully immersed in (i) tap water, (ii) strongly salty water, with the weight of waterdisplaced by it by taking at least two different solids, 4.To determine the speed of a transverse/longitudinal pulse propagated through a stretched string Chemistry: 1.To prepare a true solutio7n of common salt, sugar and alum separately in water, 2. To prepare suspensions of soil, chalk powder and fine sand in water, 3.(A) To prepare colloidal solutions of starch in water and egg albumin in water. (B) To distinguish a true solution, a suspension and a colloid on the basis of : (i) Transparency, (ii) Filtration criterion, (iii) Stability, 4. To prepare (a) a mixture, (b) a compound, using iron filings and sulphur powder and distinguish between these on the basis of : (i) Appearance i.e., homogeneity and heterogeneity, (ii) Behaviour towards a magnet, (iii) Behaviour towards carbon disulphide (a solvent), (iv) Effect of heat, 5.To separate the components of a mixture of sand, common salt and ammonium chloride (or camphor) by sublimation, 6.To determine the melting point of ice, 7.To determine the boiling point of water, 8.To verify the law of conservation of mass in a chemical reaction, Biology: 1.To prepare stained temporary mount of onion peel cells and to record observations and draw labelled diagrams, 2.To prepare stained temporary mount of human cheek cells and to record observations and draw labelled diagrams, 3.To identify parenchyma and sclerenchyma tissues in plants from prepared slides and to draw their labelled diagrams, 4.To identify striped muscle fibres and nerve cells in animals from prepared slides and to draw their labelled diagrams, 5.To study the characteristics of Spirogyra, Agaricus, Moss, Fern, Pinus (either with male or female cone) and an Angiospermic plant, Draw and give two identifying features of groups they belong to, 6.To observe and draw the given specimens—earthworm, cockroach, bony fish and bird. For each specimen record : (a) One specific feature of its phylum, (b) One adaptive feature with reference of its habitat, 7.To study the External Features of monocot and dicot plants.