Sound and Waves Quiz

What makes a sound when you speak?

• Vocal cords

• Stomach

• Lungs

• Heart

What is the substance that the sound wave moves through called?

• Gas

• Liquid

• Solid

• Medium

What is the property of all waves that allows them to be reflected from surfaces?

• Diffraction

• Refraction

• Reflection

• Interference

What do bats use echoes for?

• To find insects for food

• To communicate with other bats

• To locate their sleeping spot

• To navigate in the dark

How can boats use echoes?

• To navigate through rough waters

• To locate fish for fishing

• To communicate with other boats

• To find the depth of water under the boat

What is the method used to make the image of the unborn baby?

• Using X-rays

• Using echoes sent into the mother's body

• Using magnetic resonance imaging (MRI)

• Using ultrasound waves

Why are echoes unwanted when recording music?

• They add depth to the music

• They improve the recording quality

• They change the sound

• They make the music more enjoyable

What is the purpose of designing theatres to stop echoes?

• To reduce the cost of construction

• To ensure clear voices of people on the stage

• To enhance the sound effects in the theatre

• To create a unique acoustic experience

What is the speed of sound waves in a vacuum?

• 200 metres per second

• Sound will not travel in a vacuum

• 1000 metres per second

• 500 metres per second