Sound Y4

Which of the following is NOT a way to produce sound?

• Blowing

• Knocking

• Plucking

• Freezing

vibrations produce ___________

• sound

• light

• heat

• direction

Sound travels in _________ direction

• one

• certain

• all

• zero

What an example of reflected sound?

• thunder

• whisper

• echo

• birdsong

Which technology uses reflected sound?

• television

• radio

• microwave

• sonar

Which of the following is NOT an effect of sound pollution?

• stress

• hearing problem

• weight gain

• communication problem

What can be used to protect ears from loud sounds?

• sunglasses

• ear protectors

• helmets

• gloves

What is ultrasound?

• Very loud sound

• Sound that humans can't hear

• Sound that doesn't travel through air

Which material is commonly used as a sound absorber?

• metal

• glass

• foam

• plastic

Sound can be _________

• reflected

• refracted

• seen