Pollution is very dangerous, There are different kinds of pollution as air pollution, water pollution & soil pollution, pollution is any change in the environment that disturbs its natural balance. Soil pollution is any...
The Sun is the main source of energy, and it is very important in our life, but there are resources of energy which are renewable sources of energy and non-renewable sources of energy, They...
Importance of the Sun Do you see the Sun in the sky in the morning every day? Do you know the importance of the Sun? The Sun is the main source of energy on...
People use levers but they do not know the type of them and how to determine the type of any lever, The levers are classified according to the location of the effort force, the...
