Forget the mess of iron filings and the
constraints of two-dimensional representations of magnetic fields - this
self-contained device reveals the proper, three-dimensional nature of
magnetic lines of force. The sealed acrylic box contains iron filings
suspended in a silicone oil solution. A cylindrical magnet (included) is
dropped into a central chamber to create the three-dimensional field. Other
magnets can be applied to the sides or ends of the box to demonstrate
interesting interactions between fields. Although primarily designed for
individual study, the observation box can also be placed on an overhead
projector for a two-dimensional demonstration of the field (4" x 2" x 2").
Activities and uses
Use the Magnetic Field Observation Box to study magnetic fields in three
dimensions. Look at the field from a single provided magnet or bring iron or
another magnet near and see the results.
A sample activity from the datasheet is given
below.
Bring another magnet close to the box and insert
the bar magnet in the hole. The iron powder is magnetized in two areas
showing attraction and repulsion of magnetic forces.
Science Standards
In using this product, many of the national and states’ science education
standards are covered. Some examples are provided here. These are
representative, however. Check with your state to find the exact standards.
-
Describe the forces exerted by magnets,
electrically charged objects, and gravity.
-
Students know electric and magnetic fields
contain energy and act as vector force fields.
-
An object’s motion can be described by
tracing and measuring its position over time.
-
The motion of an object can be described by
its position, direction of motion, and speed. That motion can be
measured and represented on a graph.
-
Perform measurements and calculations to
describe the speed and direction of an object.
|