Waves and Sound Table of Contents What Are Waves? Properties of Waves Interactions of Waves The Nature of Sound Properties of Sound

What Are Waves? Motion in a Transverse Wave What are the crest, trough, and rest position?

What Are Waves? Motion in a Longitudinal Wave Which are the areas of compression and which are areas of rarefaction in the diagram?

What Are Waves? A Picture of a Sound Wave The picture shows an area of air as the compressions and rarefactions of a sound wave pass through it. The dots represent air particles. Where are the rarefaction and the compression areas?

What Are Waves? Waves Transfer Energy A wave moves the bottle in a circular motion. After the wave passes, the bottle returns to where it started. How will the bottle look in the bottom picture?

Properties of Waves Amplitude The amplitude of a transverse wave is the maximum distance the medium vibrates from the rest position. What are the parts of the wave?

Properties of Waves Properties of Waves All waves have amplitude, wavelength, frequency, and speed. TRANSVERSE WAVE Wavelength Crest Amplitude Rest position Trough Wavelength Direction of wave LONGITUDINAL WAVE Compression Rarefaction Wavelength

Properties of Waves The table shows measurements of some properties of a sound wave in water and in air. How would you complete the table?

Interactions of Waves The Law of Reflection The law of reflection states that the angle of incidence equals the angle of reflection.

Interactions of Waves Constructive Interference When waves combine to form a wave with a larger amplitude, it is called constructive interference.

Interactions of Waves Destructive Interference Describe the steps of destructive interference.

Interactions of Waves Standing Waves As the frequency of the standing wave increases, more nodes and antinodes are created. Identify the nodes and antinodes.

The Nature of Sound Diffraction Diffraction occurs when sound waves pass through an opening such as a doorway. Which picture accurately depicts this?

The Nature of Sound Speed of Sound in Air The data in the table show how the speed of sound in air changes with temperature. Discuss how you would plot temperature on the horizontal axis and speed on the vertical axis to create a line graph.

The Nature of Sound Speed of Sound The table shows the speed of sound in different media.

Properties of Sound The table compares the range of frequencies that humans and various animals can hear.

Properties of Sound Measuring Loudness The table compares the loudness of some familiar sounds.

Properties of Sound The Doppler Effect As the fire truck speeds by, observers hear a change in the pitch of the siren.

Properties of Sound How Your Headphones Work Headphones turn an electrical signal into sound waves.