An introductory lesson on circuits. Learn in this video about electric circuits,their types and the flow of electron in a circuit. Also learn how you can measure current and voltage in the two types of circuits. This is an introductory lesson on FORCES. Definition of Force (meaning of force) PUSH and PULL forces Force and motion Force effects If you need force and motion worksheets, please let me know in the comment section and i would be happy to send you one. In this video learn about the electromagnetic spectrum,the type of wave it is and examples of electromagnetic waves such as radio waves ,X-rays etc. By the end of this video, you should be able to give the definition of electromagnetic radiation and the different types of e.m waves. In this video you will learn about the properties of a wave. Wave and its two types. Transverse and longitudinal waves. Frequency,amplitude, peak and trough. Introduction to lenses.Convex and concave lenses. Use this powerpoint to revise about the topic of lenses.