The element is composed of the molecules, Each molecule consists of the atoms, the atom is electrically neutral in its ordinary state (In the atom, the number of the electrons equals the number of...
The skeletal system The skeletal system consists of 206 named bones that make up the skeleton, It is divided into main divisions which are the axial skeleton and the appendicular skeleton, It gives the...
Some concepts related to the wave motion and its properties In the transverse pulse, If the displacements associated with the wave disturbances move in a direction perpendicular to the wave motion, So, The wave...
The movement is the ability of the organism to change its position from a place to another, it is from the characteristics that distinguish between the living organisms & non-living things, The human movement...
