Make a Sound Gun

You will need

  • Plastic foil
  • Empty toilet roll
  • Scissors
  • Piece of cardboard
  • Thin strip of paper
  • Sharp pencil
  • Rubber band
  • Sticky tape

What to do

  1. Draw around the empty toilet paper roll to make a circle on the piece of cardboard.
  2. Cut out the circle from the cardboard.
  3. Use the sharp end of the pencil to make a tiny hole in the middle of the cardboard circle.
  4. Tape the circle to one end of the tube.
  5. Using the rubber band, fix a piece of plastic foil over the other end.
  6. Cut a thin paper strip, fold it and tape it to the top of the table.
  7. Point the end of the tube with the hole at the paper strip.
  8. If you tap the plastic the strip shakes.

Background

Sound waves are caused by vibrations and detected by our ears. The vibrations of loud sounds can even make things move which is shown by this experiment. Tapping the sound gun makes the paper strip shake.

Sound can even cause avalanches where snow and ice crash down a mountain. Sound waves from a loud noise disturb the snow and start it moving.

You can watch this experiment as a video here:

Kommentera

Fyll i dina uppgifter nedan eller klicka på en ikon för att logga in:

WordPress.com-logga

Du kommenterar med ditt WordPress.com-konto. Logga ut /  Ändra )

Google-foto

Du kommenterar med ditt Google-konto. Logga ut /  Ändra )

Twitter-bild

Du kommenterar med ditt Twitter-konto. Logga ut /  Ändra )

Facebook-foto

Du kommenterar med ditt Facebook-konto. Logga ut /  Ändra )

Ansluter till %s