The energy If you look around you, you will notice that everything needs the energy to do its functions. You need food to obtain the energy that helps you to work, move, play, …..etc,...
The friction Do you know what is the meaning of friction? The friction force is the force that exists between the two surfaces when they touch each other and it affects in the opposite...
Soil pollution Pollution is very dangerous, There are different kinds of pollution as air pollution, water pollution & soil pollution, The pollution is any change in the environment that disturbs its natural balance. Soil...
The sources of energy 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...
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...
The levers 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...
