 | | | Difficulty: Middle school |
| | | Difficulty: Elementary school |
| High-Ampere Magnetism!
There are a number of science museum exhibits which require many tens of
amperes of electric current in a thick cable to generate strong magnetism.
One example is a raft of compasses with a 200-amp cable running through
the center of the raft. Or, three 100-amp cables with three-phase AC
powering them, where the resulting field rotates and can spin a conductive
object by induction.
Rath |
| | Difficulty: High school |
| How do magnetic field lines look like?
Iron filings align themselves in strong magnetic fields. This reveals the shape of the field patterns. A similar thing happens with the electric fields created by high voltage and by "static electricity." If small fibers are exposed to a very strong electric or magnetic field, they will align with the field and make it visible. |
| | Difficulty: Elementary school |
| How does a bar magnet's field interact with the earth's magnetic field?
The magnetic field around a permanent magnet, like the gravitational field around a massive object, is not only invisible, but hard for students to comprehend. With no concrete experience to draw from, they tend to ignore this basic concept, or at best, memorize facts about it. This activity shows how to map a magnetic field, and to find how a bar magnet's field combines with the Earth's magnetic |
| | Difficulty: Elementary school |
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| | | Difficulty: Elementary school |
| How does a hydroelectric plant produce electricity using water?
Hydroelectric facilities are built at the base of dams to take advantage of the high pressure of the water at the bottom of a reservoir. The water pressure is funneled through a tunnel through the dam called a penstock. The water then is focussed on the blades of a turbine. Water pressure of the water turns the turbine, and the turbine turns a generator making electricity. This simple experiment w |
| | Difficulty: Elementary school |
| How to build a levitating train using magnets
This is a great demonstration of like poles repelling each other. We have a platform which floats above a pair of magnetic tracks, and can be gently pushed to one end or the other. This is similar in concept to the MAGLEV trains which are being worked on in Germany, Japan and France |
| | Difficulty: Elementary school |
| | | Difficulty: Elementary school |
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Science kits, science lessons, science toys, maths toys, hobby kits,
science games and books - these are some of many products that can
help give your kid an edge in their science fair projects, and develop
a tremendous interest in the study of science. When shopping for
a science kit or other supplies, make sure that you carefully review
the features and quality of the products. Compare prices by going
to several online stores. Read product reviews online or refer to
magazines.
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