activity

Take a thin layer of tissue from the lower surface of the leaf. Mount it on a slide in water and examine under a microscope. You will find tiny pores or stomata along with the epidermal cells. The stomata are bound by a pair of guard cells whose concave sides face each other. It is through the stom..

Draw a scalene triangle, an acute angled triangle, an obtuse angled triangle, an equilateral triangle and a right angled triangle. Measure the angles in all the figure. Enter the measure in the table given. What do you observe? What do you conclude with respect to the sum of the magnitudes of all ..

Draw a scalene triangle, an acute angled triangle, an obtuse angled triangle, an equilateral triangle and a right angled triangle. Measure the angles in all the figure. Enter the measure in the table given. What do you observe? What do you conclude with respect to the sum of the magnitudes of all ..

Take a thin layer of tissue from the lower surface of the leaf. Mount it on a slide in water and examine under a microscope. You will find tiny pores or stomata along with the epidermal cells. The stomata are bound by a pair of guard cells whose concave sides face each other. It is through the stom..

Take a nichrome wire of about 50 cm length and apply a potential difference of 1.5 V from a battery. Measure the current flowing through the wire using an ammeter connected to it in series, and note the potential difference across the resistance using a voltmeter connected across it. Note down and ..

If the above activity is repeated with another wire or a torch bulb, the current values are found to be different in each case. This shows that the current through the circuit is not decided by the battery but by the component through which it passes. Some materials allow larger current t..

Visit an agricultural institute where hybridization is done and study how Plants are grown in artificial conditions. Artificial cross-pollination is done. Tissue culture is done..

Take 3 pots with soil. Place an entire leaf of Bryophyllum in one pot, a piece of a leaf in another pot and an injured leaf in another pot. Observe the conditions under which the propagation occurs. Other examples are Begonia, Kalanchoe Streptocarpus and Saintpauli..

Take hydrated copper (II) sulphate crystals in a test tube and heat. The blue crystals in the test tube start turning white on heating. Water vapours released on heating condense on the cooler part of the test tube. Collect the water drops in a dish. The crystalline copper sulphate turns to a whit..

In a transparent combustion tube, cotton wool dipped in concentrated hydrochloric acid and liquor ammonia is introduced separately from the two ends of the tube. Both the ends of the combustion tube are then closed with rubber stoppers (Fig.5.6)...