Read It! Read the text. When you have finished reading, click =CONTINUE=>.

Can you see sound?

Sounds can be found everywhere! Sounds can be found inside, outside and all around. People can make sounds and there are sounds from nature. Sounds can be loud or they can be soft. Sounds can be a low pitch or a high pitch. Sound waves can make things vibrate and move. You can hear sounds and you can see what happens when sound waves cause some materials to vibrate.

Let us discover how sounds can make things move. Find a piece of tape, some thread, and a radio. Hang the thread down in front of the speaker and tape it to the radio. Now turn on the radio. Watch the thread very carefully. Did the sound make the thread move? If the thread did not move, make it louder. The sound should make the thread move. Experiment with different volumes. So now you know that you cannot see sound, but you can see that sound makes things move.

=CONTINUE=>