Sound

Question 1

What is volume?

Answer 1

How loud/quiet the sound is.

Question 2

What is pitch?

Answer 2

How high/low the sound is.

Question 3

What is frequency?

Answer 3

How many waves in set time.

Question 4

Higher frequency means higher…

Answer 4

Pitch.

Question 5

Smaller wavelength means…

Answer 5

Frequency is higher(higher pitch)

Question 6

What is amplitude and what is relates to?

Answer 6

How much the displacement is, relates to volume.

Question 7

What is amplitude on a wave diagram?Higher means..

Answer 7

Amplitude is the height of the wave.Higher means louder.

Question 8

Sound travels faster in a..

Answer 8

Solid because of its rigid structure.Means sound waves vibrate quicker.

Question 9

What is ultrasound?

Answer 9

Sound waves with frequencies higher than the limit of human hearing.

Question 10

What is infrasound?

Answer 10

Sound waves with frequencies lower than the limit of human hearing.

Question 11

Give 3 medical uses of ultrasound.

Answer 11

• Pain relief.
• Images of foetus.
• Cleaning medical tools.

Question 12

How does sonar/echolocation work?(6)

Answer 12

Ultrasound waves
Sent out
Hits an object
Reflects back
Detects sound waves
Calculates

Question 13

Light or sound travels faster?

Answer 13

Light.Use lightning as an example.

Question 14

Transverse waves.

Answer 14

Vibrations are perpendicular(right angles) to the direction of travel.

Question 15

Longitudal wave.

Answer 15

Vibrations are parallel (along same direction) as the directions travel.

Question 16

What is superposition?

Answer 16

When waves going in different directions pass through each other.

Question 17

Reflected waves?

Answer 17

When waves reach a solid barrier.

Question 18

How does the sound waves transfer energy with vibrations?

Answer 18

Energy is transferred in the form of sound waves.

Question 19

Why does sound decrease with the distance?

Answer 19

Sound waves get smaller because they have transferred a lot of energy and their more spread out.

Question 20

What does scatter graphs show?

Answer 20

To show relationship/correlations.

Question 21

What does line graphs show?

Answer 21

To compare the changes of 2 different variables.

Question 22

Key words for a longitudal wave? (2)

Answer 22

Expansion/rarefraction

Compression

Question 23

Key words for a transverse wave?

Answer 23

Peak

Trough

Question 24

How does ultrasound serve as pain relief.(3)

Answer 24

• Improves blood circulation.
• Raise levels of cell activity.
• Provides micro-massage.

Question 25

What is the human hearing range?

Answer 25

20Hz-20000Hz

Question 26

What is the humans hearing limit without damaging ears?

Answer 26

120dB