Sound

Question 1

How is sound produced

Answer 1

It is produced by vibrations, vocal cords, air molecules and ear drums

Question 2

What can sound travel through

Answer 2

Sound can travel through solid, liquid or gas. It can’t travel through vacuum (no air) therefore it needs a medium to travel through

Question 3

Sound and light

Answer 3

Light can travel through vacuum while sound cannot. Sound travels slower than light. This is why we see lightning before thunder

Question 4

Echo

Answer 4

A reflection of sound. Dolphins can communicate and fishermen can find fish

Question 5

Ultrasound

Answer 5

Sound above the level of hearing

Question 6

How do we hear

Answer 6

Our ears detect sound vibrations in the air

Question 7

Ear protection

Answer 7

If people are working in a job where sound is above 70db have to wear protection

Question 8

Sound made by vibrations

Answer 8

Diaphragm of a speaker vibrates you can feel the air being pushed. A guitar or violin string will vibrate when plucked. Holding a ruler firmly at one end and bending it at the other causes vibrations that can be seen

Question 9

What is a medium

Answer 9

A medium is either a solid, liquid or gas

Question 10

Sound intensity level

Answer 10

The loudness of the sound is called the sound intensity level

Question 11

What is a sound level meter

Answer 11

A sound level metre is used to measure the loudness of a sound in decibels

Question 12

Sound

Answer 12

A form of energy