The light waves The light is an external factor that affects the eye causing the sense of vision, The light waves are electromagnetic transverse waves that can travel through free space with velocity 300000...
The diseases of the female genital system and the male genital system are classified into two types which are diseases that do not arise from sexual contact and diseases arise from sexual contact (The...
The bats Some animals use echoes to locate and identify the objects, The echolocation is used for navigation and for foraging (hunting) in various environments, The bats can use the phenomenon of sound reflection...
The states of matter All matters have a mass and take up space, the state of matter is one of the distinct forms that matter takes on, and there are four states of matter...
