Waves transfer energy from one place to another through a disturbance or vibration in a medium. There are different types of waves including transverse waves, longitudinal waves, and surface waves which move media in different directions relative to the wave propagation. Waves are classified based on how the medium moves as the wave passes through.

1. What are Waves?

2. Waves and Energy A is a disturbance that transfers energy from place to place. The disturbance caused by a wave is . Many waves require something to through. The material through which a wave travels through is called a . Examples: Click on the words, gases, solids, and liquids, to reveal the answer. Gases: Liquids: Solids: WAVE temporary TRAVEL MEDIUM AIR WATER

3. Waves that require a medium through which to travel are called . Not all waves require a medium to carry them along. Light from the sun, for example, can travel through . Waves are created when a source of causes a medium to . A is a repeated back and forth or up and down motion. This motion is the wave. Watch this video on a wave being done at Rutgers Stadium. Most anytime you go to a game no matter what the sport someone always starts the wave. This photograph is at an Atlanta Braves game. MECHANICAL WAVES EMPTY SPACE (A VACUUM) ENERGY VIBRATE VIBRATION

4. Types of Waves Waves are classified according to how they . There are types of waves. Watch this short clip on the Nature of Waves. MOVE TRANSVERSE LONGITUDINAL SURFACE

5. Waves that move the medium at angles to the direction in which waves are traveling are called . Transverse Waves The highest parts of the wave are called , and the lowest parts are called . RIGHT TRANSVERSE WAVES CRESTS TROUGHS

6. rest position crest amplitude trough wavelength Transverse Wave

7. Longitudinal Waves move the particles of the medium parallel to the direction in which the waves are traveling. The parts where the coils are close together are called . The parts where they are spread out are called . Longitudinal waves compressions rarefactions

8. Surface Waves are combinations of transverse and longitudinal waves. These waves occur at the surface between two mediums, such as water and air. When a wave passes through water, the water (and anything on it) moves up and down, like a transverse wave on a rope. The water also moves back and forth slightly in the direction that the wave is traveling, like the coils of the spring. Surface waves

9. Fini Wave good – bye – you are done