Sound

Hi we’ve been learning about sound in science.

What is sound?

Sound is vibrations when something vibrates it makes sound and then it vibrates the air which gets the sound to our ears.

What is echo?

Echo is when the sound bonus of a wall gets into your ear again.

Experiment

In are experiment we knocked on a bunch of surfaces like the wall a desk and the carpet the carpet made the sound quiet the wall no echo and the desk made a loud and echoey sound. this is a video of the project

this is a video about how the ear works

this is a video about sound

 

Fun Facts!

1. Some walls are sound proof which means you can’t hear sound from the other side. They are normally used in things like fireworks.
2. The volume of sound is measured in decibels this is used for things like devise volume.

 

Properties Of Sound

1. Sound is a wave
2. Sound is vibrations
3. Sound moves at different speeds through different things.