Page 23 - FOUNDATIONS FOR LIFE; EXPLORING GOD’S UNIVERSE
P. 23
TEST ON SOUND
1. How are sounds formed? Sounds are produced by vibrating objects. Air is made to shake back
and forth very fast. These shaking movements are called vibrations. (1 mark)
2. Does sound travel faster through air or through water? Water (1 mark)
3. Label five parts of the human ear. (5 marks)
stirrup
anvil semi-circular canals
auditory
nerve
cochlea
outer ear
eustachian
tube
ear-drum hammer
4. How does the ear-drum work? The ear-drum is a thin membrane which separates the outer and
middle ear. Its function is to transmit sound from the air to the bones in the middle ear.
(1 mark)
5. Sounds travel in waves (1 mark)
6. We measure sound in decibels. (1 mark)
7. What do we mean by ‘noise pollution’? When sounds are too loud eg a space rocket produces
200 decibels, we call it noise pollution. It is when the sound annoys, disturbs or intrudes
people’s lives. (1 mark)
8. How can we reduce noise in our homes? Double glazing, sound-proof rooms, turning down
appliances. (1 mark)
9. Describe how you made a musical instrument. ________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________
10. Light travels slower than sound. True or false? False (1 mark)
Total marks = 15
21
