SOUND grade 6

Question 1: What is sound?

• A type of light

• A form of energy that we can hear

• A type of heat

• A form of electricity

question 2:What is the unit used to measure the loudness of sound?

• hertz

• Decibel

• kilogram

• watt

question3:What is the speed of sound in air approximately?

• 300m/s

• 340m/s

• 1500m/s

• 1000m/s

question4:In which medium does sound travel the fastest?

• air

• water

• steel

• vacuum

question5:What is the source of all sound?

• light

• vibration

• heat

• electricity

question 6:Which material is commonly used to absorb sound and reduce echoes?

• glass

• rubber

• foam

• metal

question7:Which animal is known for using echoes to navigate and locate prey?

• tiger

• bat

• elephant

• giraffe

question8:In which type of environment is echo most likely to occur?

• A room with a lot of soft furnishings

• A room with bare, hard surfaces

• A room with dim lighting

• A room with no windows

question 9:What role does a smooth surface play in the formation of a clear echo?

• Absorbs sound

• Reflects sound

• Scatters sound

• Diffracts sound

question10:How does sonar work?

• By emitting and receiving sound waves

• By using radio waves

• By utilizing light waves

• By sending vibrations through water