Sound waves - revision

What occurs when a wave strikes an object or surface and bounce off?

• diffraction

• refraction

• a transverse wave

• reflection

What is the name for a change in the direction of a wave when it passes from one medium into another?

• refraction

• reflection

• interference

• diffraction

What determines a pitch of a sound?

• amplitude

• frequency

• speed

• refraction

what color light has the shortest wavelength and the highest energy?

• red

• green

• orange

• blue

an earthquake wave travels at 5000m/s and has a wavelength of 500m, so the frequency will be

• 10Hz

• 12Hz

• 0.10Hz

• 0.12Hz

when two waves overlap and interfere constructively, what does the resulting wave have?

• less energy

• a lower amplitude

• a greater amplitude

• a change in frequency

What is the unit for the sound intensity?

• meters

• meters/second

• hertz

• decibels

What happens if the energy of a sound wave decreases?

• its frequency decrease

• its amplitude decrease

• its speed decrease

• its wavelength decrease