We use fibres . Fibres have many uses they are used for making clothes   , carpets , sails of boats , para chutes , upholster and many more items . These are classified into categories artificial and natural fibres . Artificial fibres are those which are made by man  an . Nylon , rayon [...]

A simple pendulum can be made by suspending a metal bob from a cotton thread . If the bob is pisplaced a little to one side and let go , it starts executing periodic oscillations . We call the time taken by the pendulum to complete one such oscillation as the time period of the [...]

Following newton’s discovery of the phenomenon of dispersion , some people came up with a query are the seven colours already present in the white light or they somehow given by the prism to the incident white light ? to set such doubts at rest, Newton performed two more experiments with prisms . These helped [...]

Just like different animals live in different climates successfully , plants too show special adaptive features for the type of soil they grow in. Plants growing in sandy soil have long roots that go deep in search of water . Their leaves are reduced to spines of water . Their leaves are reduced to spines [...]

We can say that an object  is moving when its changing its position continuously with respect to its surroundings . We see many object moving around us . How can we decide which one is moving faster. Suppose we are watching the motion of a car and a bullock cart on the road . within [...]

Although leaves normally do not produce new plants,in certain cases , they can be a means of vegetative reproduction for example , bryophyllum can reproduce  through its leaf . Many small plantlets arise from notches of the leaf . These get detached from  mother plant and give rise to new plants

Certain plants have tuberous roots are swollen due to the storage of food .These roots produce buds on them . If these root buds are planted in the soil , they grow into new plants . For example , sweet potato , dahlia, cassava and asparagus . other example are lemon and tamarind ,m where [...]

Kidneys are bean in shaped structures and anout 10 cn long . The are dark red in colour and present in a singular pair in the abdomen of human beings , just above the waist , on either side of the backbone . These are the major execxtory organs in human beings . Each kidney [...]

We have seen that iron nail behaves like a magnet when a current is flowing through it the wire wound around it . It loses its magnetisms whenthe current is swithed off.We such a setup an electromagnet An electromagnet is , therefore , a setup whose magnetism can be switched on and off . The [...]

The absorption of water is a continuous process as a result   of which plants absorb a large quantity of water . You must have observed that the gar5dener of your school waters the plants everyday . Some times, during summers , we need to water the plants even twice a day . Hve you ever [...]