Sound

Question 1

Sound is produced by

Answer 1

Vibrations (vocal cords, air molecules, ear drum

Question 2

Sound can travel through a

Answer 2

Medium e.g. Solid, a liquid or a gas

Question 3

Sound can’t travel through a

Answer 3

Vacuum (no air) therefore it needs a medium to travel through

Question 4

Sound

Answer 4

Is a form of energy

Question 5

The speed of sound in air

Answer 5

Is 340m/ s, light is 300,000,000. 3x10(8)

Question 6

An echo

Answer 6

Is a reflection of sound

Question 7

Ultrasound

Answer 7

A level of sound above our level of hearing

Question 8

If people are working in a job where sound is above 70db (decibels)

Answer 8

They have to wear ear protection (busy traffic street)

Question 9

Sound above 150 doc can cause

Answer 9

Permanent damage (speakers in a nightclub are 120db)

Question 10

The loudness of a sound

Answer 10

Is called the sounds intensity level

Question 11

Sound intensity levels are measured in

Answer 11

Decibels

Question 12

A sound level metre

Answer 12

Is used to measure the loudness of a sound in decibels