How does an amplifier make sound louder?

• By connecting to a loudspeaker
• By connecting to a microphone
• By increasing the volume
• By reducing the volume

What is the purpose of a sound system?

• To make sound clearer
• To make sound louder
• To make sound softer
• To make sound quieter

Why do we fit silencers on vehicles?

• To make the engine louder
• To increase the speed
• To reduce air pollution
• To make the engine quieter

What materials can be used to muffle noise in buildings?

• Concrete and bricks
• Glass and metal
• Plastic and wood
• Carpets and curtains

How do ear defenders muffle sound?

• By increasing the volume
• By blocking sound waves
• By amplifying sound waves
• By reducing the volume

What is an example of noise pollution?

• A peaceful park
• A calm beach
• A busy street
• A quiet library

What is the negative effect of noise pollution on the environment?

• It can cause hearing loss
• It makes the environment more peaceful
• It reduces air pollution
• It helps plants grow

What is the best solution to reduce noise pollution?

• Make the sound louder
• Muffle the sound
• Increase the volume of noise
• Ignore the noise

In a fair test you should...

• only change one variable (the independent variable)
• change all the variables 
• change no variables 

Cows Moo Softly stands for

• Change

  Many

  Shoes

• Change 1 thing

  Measure or Observe

  Same for everything else

• Chips

  Milkshakes

  Snag