science 5 formatif chapter 2

A car horn is a common sound in cities. It is an example of a ... sound source.

• natural

• man-made

• pitch

• quiet

For a sound to be produced, an object must ... .

• change color

• stop moving

• vibrate

• get colder

Sound cannot travel through outer space because it is mostly a ... .

• solid

• liquid

• gas

• vacuum

Here are the correct statements about how sound travels, except ... .

• sound needs a medium to travel through

• sound travels faster in water than in air

• sound travels fastest through a vacuum

• sound travels because there is vibration

When you are swimming underwater and hear a motorboat, the sound travels to your ears through ... .

• a solid

• a liquid

• a gas

• a vacuum

The best example of sound traveling through a solid is ... .

• hearing a radio playing in another room

• listening to someone talk across a table

• putting your ear to a railroad track to hear an approaching train

• whales singing to each other in the ocean

The unit used to measure the volume of sound is … .

• decibel (dB)

• meter (m)

• hertz (Hz)

• liter (L)

The best example of a sound with a low pitch is ... .

• an elephant

• a bat

• a birds

• a violin

Here the tools that can make the sound louder, except ... .

• microphone

• an amplifier

• a loudspeaker

• an ear defender

Acoustic panels and carpet in a recording studio are used to ... sounds.

• amplify

• reflect

• muffle

• record