activity

Draw a triangle ABC. Mark the mid-points of BC, AC and AB as D, E and F respectively. Join AD, BE, CF. AD, BE and CF are the three medians of D ABC. They pass through (or meet) at the same point (or common point). G is the point of concurrence of the medians. It is called as centroi..

Complete the following table by measuring the interior and exterior angles of the figure given above using a protractor. Study the table carefully and identify the relation between exterior and interior opposite angle..

Hold a pin erect on a pile of papers. Keep another pin next to it upside down in such a way that its flat head rests on the pile. Press both these pins down by placing a flat object such as duster. We observe that pin which is erect pierces through the pile of paper..

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..

How can you make soap at home or in class by using any vegetable oil, caustic soda and common sal..

Take a new iron nail, a gold item (ring or chain) and a silver item (ring or chain) during rainy weather. See that these are exposed to the effects of moist weather for a few days (3 to 4 days). 1) What changes are observed to all these items in the moist air? 2) How will you know which metal is ..

Following are some simple activities and experiments related to photosynthes..

Following are some simple activities and experiments related to photosynthesi..

The transport of materials across the cell membranes with the help of energy is called active transport. Both diffusion and osmosis are passive transport mechanisms, not requiring energy. Active transport helps in the transport of ions across the membranes of the cells. The mine..

Water is absorbed due to activities going on in roots. Absorption of water occurs with the help of energy in the form of ATP, which is released due to metabolic activities of root cells such as respiration. Absorption takes place against concentration gradient - even when the co..