The air is pressed inside during moving the paper banger downwards and the air suddenly is free when the inner layer is coming out. It is a small explosion. It is very similar to the way thunder sound is created. There are many variations of a paper popper, but they all involve a folded sheet of paper being gripped and propelled down, causing air to be forced into the paper's folded flaps, making the paper flaps pop out in the opposite direction at a high velocity, thus making a loud popping noise. What actually happens is that air rushes in to fill the vacuum created in the pocket that opens. Most papers work for poppers, although some are louder than others
Concepts: The popper opens out when it is snapped through the air. As it opens out, it actually catches the air and the paper is pulled open very quickly. Some resources suggest this sound is created in the same way a swift moving aircraft breaks the sound barrier.
Questions: How is this sound made?
What seems to "cause" the sound?
Materials: One full piece of newspaper for each participant.
All you need for this experiment is a sheet of stiff paper measuring about 16in. by 12in. (Printer Paper)
Step 1: Fold the longest edges of the paper together. Then open it out. 
Step 2: Fold the corners into the first fold. Step
3: Fold the paper in half along the first fold. Then fold in half again lengthways. 
Step 4: Open out the second fold. 
Step 5: Fold down the two sharp corners. 
Step 6: Fold the paper back along the second fold to make a triangle shape.
Step 7: Grip the banger firmly by the two sharp corners. Flick it down quickly- and it makes a loud bang.
Great job! I think this is a great experiment to do with children it lets them be involved while making their own paper banger and gets the idea across.What would happen if you used a different kind of paper! could it be louder with different paper.
ReplyDeleteGood job! I had a hard time getting mine to work but the written directions along with pictures were a great idea! I would try different types of paper with the students and have a discussion about why one type works better than another.
ReplyDeleteGreat job girls! The powerpoint had a lot of great information. Kids would love this. Great experiment!
ReplyDeleteI liked this experiment... even though my banger wasn't that loud!.. I think that stiffer paper would work better but, it would probably be harder to bang! Also I think it all depends on the way you fold the paper banger
ReplyDelete