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Worksheetsch.2 & ch.4 revision - CL.5A
Total questions: 14
Worksheet time: 7mins
We use electricity everyday, it is
( ) in our daily life.
(a)
What is used to measure the loudness of sound?
Decibel
Kilogram
Metre
Litre
A magnetic force is produced when we ( ) an iron nail with an electric wire and connect it to a battery.
(a)
An ( ) is produced when sound reflects from an object during sound transmission.
(a)
When the short bar on a xylophone is hit, the pitch is
( ).
Higher
Lower
When a glass that is full of water is hit with a spoon, the pitch is
( ).
higher
lower
Fluorescent bulbs have a longer lifespan and are more energy-efficient that LED bulbs.
True
False
Soft materials ( ) sound.
(a)
Motors make use of ( ) to work.
(a)
What does an electronic tablet (iPad) mainly produce? [more than one answer]
Sound
Motion
Heat
Light
Motion
( ) can reduce the sound by the contact of car wheels with the ground.
(a)
Sounds vary in ( ).
(a)
Hard materials ( ) sound.
reflect
absorb
Which type of light bulb is the most energy efficient?
LED bulb
Incandescent light bulb
Compact fluorescent lamp (CFL)
