This lesson covers what longitudinal and transverse waves are, the features of both kinds of waves, examples of these waves and what happens when waves meet barriers or each other. This is a perfect introduction lesson to KS3 topic on sound and waves. This Lesson Contains: Lesson powerpoint, including instructions for key demonstrations of both types of waves, full answers, plenary tasks, AFL whiteboard and discussion activities Student worksheet (PDF and editable version) Student worksheet answers sheet (PDF and editable version) Lesson Objectives Name the two different types of waves and label their features Give an example of each kind of wave Describe what happens when waves hit a barrier Describe what happens when waves superimpose