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- 1. Multiple Choice
Sound travel through....
solids and liquids
solids, liquids and gases
solids only
- 2. Multiple Choice
According to the investigation in class, sound travels best through....
solids
liquids
gases
- 3. Multiple Choice
Sounds are made when things....
move
vibrate
jump
- 4. Multiple Choice
If we want to amplify the sound of a clock we can use a carbboard tube between the clock and your ear, because
it will reduce the sound
it will muffle the sound
it will trap the sound vibrations making it louder
- 5. Multiple Choice
The ______________ of a sound is how loud or soft it is
level
volume
intensity
- 6. Multiple Choice
This is the unit we use to measure the volume of sound
pitch
hertz
decibel
- 7. Multiple Choice
Order the sound sources from the softest to the loudest in decibels
baby crying, children talking, thunders
children playing, an airplane, a spaceship
a vacuum cleaner, an airplane, a car
- 8. Multiple Choice
The pitch of a sound is different from the volume of a sound
true
false
- 9. Multiple Choice
Is it possible to change the pitch of a percussion instrument?
Yes
No
- 10. Multiple Choice
A circuit has wires, and a bulb. What is missing?
switch
buzzer
a battery
- 11. Multiple Choice
A computer uses...
mains electricity
cells
- 12. Multiple Choice
If a circuit has some interruptions and gaps, we call it...
a close circuit
an open circuit
- 13. Multiple Choice
Will a close circuit work?
Yes
No
- 14. Multiple Choice
What is the component that allows open and close a circuit?
A battery
Wires
A bulb holder
A switch
- 15. Multiple Choice
How do we call the strenght of electricity?
buzzer
current
voltage
- 16. Multiple Choice
Cells have much stronger voltage than mains electricity
true
false
- 17. Multiple Choice
Which is not a safety rule to avoid getting an electric shock?
Never put anything into the wall socket
Never touch batteries with your hands
Never use electrical appliances when your hands are wet
- 18. Multiple Choice
Metals that contain __________________________ are magnetic.
steel and zinc
nickel and aluminium
cobalt, nickel and iron
- 19. Multiple Choice
Precious metals like gold or silver are ....
non-magnetic
magnetic
- 20. Multiple Choice
Which one is not a characteristic of aluminium?
light in weight
magnetic
doesn't rust
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