The tablets are ready for education as they are the best way to show textbooks, They can offer enhanced ebooks that feature images, video, audio, and these elements are impossible to include in print...
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...
