SCIENCE YR 4 UNIT 6 SOUND

Which of the following is a property of sound?

• sound can be destroyed

• sound can be reflected

• sound travels in all directions

Aaron is in his classroom which is on the third floor. However, she can hear the teacher talking to the pupils one floor below. How can this situation occur?

• The teacher is using magnifying glass to overcome her limitation

• sound is absorbed by objects around the classroom

• voices echoes and travels in all directions

The string of the guitar is struck and starts to vibrate. What will happen next?

• The guitar will make light.

• The guitar will make sound.

• The guitar will become heavier.

Sound___________ in all directions

• is absorbed

• travels

Sound is produced by __________________________

• vibration

• refraction

There are various uses of sounds in daily life such as ___________________

• an alarm clock

• a mirror

Extremely loud sound can be ____________________

• beneficial

• harmful

How the sound is produced?

• By knocking

• By talking

• By blowing

• By clapping

Why is the vehicle giving out sound while it was being driven?

• Giving out sound to entertain the public

• Telling the public to give way during an emergency

• Attracting attention from people in the surrounding area

which of the following is not an application of sound reflection?

• sonar

• Echo in fish

• Radar