Explain that earthquake waves move particles of material in ... Introduce to your students the two simplest types of wave interactions with rocks: reflection and refraction. Ask students to ...

Structured questions, with command words such as describe or explain, will be worth ... benefits and risk of using these waves to scan patients. Two types of waves are longitudinal and transverse.

How does the wave travel towards the shore, but the sea water does not? Using demonstrations on the beach and his animated sketchbook Jon looks at the two main types of wave: transverse and ...