How-To Themes. Opt for a how-to theme if you want your students to research key steps in a process, according to the Common Core State Standards Initiative. Tell your class that the topics must relate to social studies, science, history, literature, technology or business.
In which kind of wave do the particles of the medium move at right angles to the direction in which the wave is traveling. Transverse. In what way do the particles in the wave move when surface waves combine the properties of transverse and longitudinal waves.
In longitudinal waves, particles of the medium vibrate to and from in a direction parallel to the direction of energy transport. If the particles only moved north and not back south, then the particles would be permanently displaced from their rest position; this is not wavelike.