Sound

Question 1

What is the range of human hearing?

Answer 1

20-20,000Hz

Question 2

What are sound waves caused by?

Answer 2

Vibrating objects or particles

Question 3

What type of waves are sound?

Answer 3

Longitudinal waves

Question 4

What is the speed of sound in air?

Answer 4

330-350m/s

Question 5

Waves travel through ? And ? Density areas

Answer 5

High + low

Question 6

What’s an area of low density sound waves called?

Answer 6

Rarefactions

Question 7

What’s an area of high density sound waves called?

Answer 7

Compressions

Question 8

What are the two properties of sound?

Answer 8

Pitch + volume

Question 9

Increased frequency =

Answer 9

Higher pitch

Question 10

Higher amplitude =

Answer 10

Louder volume

Question 11

What is the volume controlled by?

Answer 11

Amplitude

Question 12

What is the pitch controlled by?

Answer 12

Frequency

Question 13

What are echoes caused by?

Answer 13

Reflected sound waves

Question 14

What can echoes measure?

Answer 14

Depth eg submarines to sea bed

Question 15

What is an ultrasound?

Answer 15

Sound waves with frequency above human hearing (20,000Hz)

Question 16

Ultrasound uses

Answer 16

Seeing babies in pregnancy
Finding flaws in metal or cracks in wood
Break up kidney stones