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Apparatus required: Sections of a chlorophyll-free leaf, platinum chloride or picric acid or sodium cobaltnitrate, distilled water, glass slides, cover slips and microsc..

Brownian motion can be demonstrated simply by releasing some smoke particles from burning cord into a small glass container and putting a cover plate to seal the smoke and air into the cel..

Water is the only substance that can exist simultaneously in all the three states of matter, i.e., solid, liquid and gaseous on this earth,. A simple experiment shows the existence of all these three states together. Take a glass half packed with ice cubes and cover it. Th..

This method is used to separate volatile solids, from a non-volatile solid. The mixture is taken in a china dish covered with a perforated filter paper on which an inverted glass funnel is placed to collect the vapours. Upon heating, the substance vapourizes and gets deposited ..

Global Warming - The addition of certain pollutants like the carbon dioxide gases increases the temperature of the earth. These gases remain close to the surface of earth, forming an insulating layer. The surface becomes hot due to the solar radiations. This radiation is normally reflected back int..

Physical States of Water - Water is the only substance that can exist simultaneously in all the three states of matter, i.e., solid, liquid and gaseous on this earth,. A simple experiment shows the existence of all these three states together. Take a glass half packed with ice cubes and h..

Scrape the inside of your cheek using an ice-cream spoon. Spread the tissue in a drop of water on a glass slide. Add a drop of methylene blue and place a cover slip. Observe the cells (epithelial) under the microscope. Epithelial cel..

Scrape the inside of your cheek using an ice-cream spoon. Spread the tissue in a drop of water on a glass slide...

Take some crystals of iodine in an evaporating dish. Cover it with a glass funnel, as shown in figure 2.3. Close the tip of the tail of the funnel with some cotton. Heat the dish gently. The space inside the funnel gets filled with purple vapours of iodine. Stop the heating. The..

When we look at a glass of still water on the table, it seems incredible that millions of molecules are moving about restlessly inside it. A British botanist called Robert Brown, however, discovered evidence of this movement over 200 years ago. He was observing through a microscope some ..