Matter exists in three states which are solid, liquid, and gas, and the matter can change from one state to another by heating, The change of matter from the solid state to the liquid...
The uterus The uterus is a hollow pear-shaped organ and it has a muscular wall that can expand as the fetus grows during the pregnancy, the uterus is the largest and major organ of...
The movement of electrons The electrons are negatively (- ve) charged particles, They revolve around the nucleus with very high speed, The electron has a negligible mass relative to that of the proton or...
The reflection The reflection is the change in the direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated such as...
