6.1 Sound waves [Should do]

1. Some flying insects make a buzzing sound. What causes this sound?

• The movement of their wings

• The color of their bodies

• The food they eat

• The places they live

Sound travels through air as a sound ...............

• current

• wind

• wave

• stream

Thunder can make objects inside a room vibrate.

Vibration of ____________ particles which are caused by the thunder make the objects vibrate.

A fly is walking up a glass window. The fly's feet make vibrations. Explain why people cannot hear the sound of the fly walking.

• The vibrations are very small, so the sounds are too quiet to hear.

• The fly's feet do not touch the glass at all.

• People can only hear sounds made underwater.

• The sound waves travel too fast to be detected.

The Moon has no atmosphere. People who went to the Moon wore suits that contained air. They worked close together. They did work such as hammering and digging. Explain why the people doing this work could not hear it happening. 

Explain why the people doing this work could not hear it happening.

• There is no air on the Moon. Sound waves cannot travel without air.

• There is no gravity on the Moon. Sound waves cannot travel without gravity.

• There is no water on the Moon. Sound waves cannot travel without water.

• There is no light on the Moon. Sound waves cannot travel without light.

Explain whether you would really hear an explosion in space.

• You would not hear an explosion in space because sound cannot travel through a vacuum.

• You would hear an explosion in space because sound travels faster in a vacuum.

• You would hear a faint explosion in space because some sound waves can travel through a vacuum.

• You would hear an explosion in space only if you are close enough to it.

Explain what causes the object to vibrate.

For each of these statements, tick at the "true" statement.

• Sound travels through solid wood.

• Sound travels through water.

• Sound travels through a vacuum.

A sound is sent from the bottom of a ship. The sound goes down through the water, as shown in the diagram. What happens in the sound wave?

• The particles in the water do not move.

• Particles in the water vibrate from side to side.

• Particles in the water vibrate up and down.

• Particles in the water vibrate randomly.

Sofia holds her hand in front of the loudspeaker cone while loud music is playing. What will she feel?

• She will feel vibrations on her hand.

• She will feel heat from the speaker.

• She will feel nothing unusual.

• She will feel a cold breeze.