NotesFAQContact Us
Search Tips
Peer reviewed Peer reviewed
Direct linkDirect link
ERIC Number: EJ1025234
Record Type: Journal
Publication Date: 2013-Dec
Pages: 3
Abstractor: As Provided
Reference Count: 3
ISSN: ISSN-0031-921X
The Jar Magic--Instructional Activities for Teaching Air Pressure
Ku, Bing-Hong; Chen, Chyong-Sun
Physics Teacher, v51 n9 p557-559 Dec 2013
There are a variety of impressive activities designed for teaching the concept of air pressure to junior high school students. Water, glasses, balloons, plastic bottles, and suction cups are some of the items commonly used in these experiments. For example, if we take a glass of water, cover it with a piece of cardboard, and invert the glass, amazingly, no water spills out. Further, one may also use balloons and plastic bottles as the components in another experiment. Place a balloon in a plastic bottle and spread the balloon's mouth over the bottle's rim. Inflate the balloon by blowing into it. Students will be astonished at the fact that the balloon remains inflated even though its mouth is open. Making suction cups "stick" to the wall is also an instance of proving how air pressure works.
American Association of Physics Teachers. One Physics Ellipse, College Park, MD 20740. Tel: 301-209-3300; Fax: 301-209-0845; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Junior High Schools
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A