The atmosphere contains oxygen gas that necessary for the respiration process, It is a mixture of gases surrounding the Earth, It is attracted to Earth by gravity, It protects the Earth by absorbing ultraviolet...
The Celsius thermometer The Celsius thermometer is the thermometer that is used to measure the temperature of liquids, the Swedish scientist “Andres Celsius” created the Celsius scale 1747, While recording the temperature, the thermometer...
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...
