Grade Science Fair Projects
The study of electricity makes for one of the most interesting
of 4th grade science fair projects. Children at this age are just
starting to become curious about such things and they also have
a good grasp of understanding for such topics.
- Rectangular magnet
- Two pieces of material, such as cardboard approximately 5"
- Two ¼" dowels, 7 centimetres or longer (pencils
will do just fine)
- Several paper clips
- A non-metallic material such as a drinking straw or Popsicle
- Something metallic such as a dull knife
- Glue or rubber bands
To assemble, attach dowels to a piece of the cardboard. Situate
the dowels near the edges. Glue the next piece of cardboard to the
dowels so the dowels sit in between the pieces of cardboard. Secure
the magnet on to the top of the cardboard with glue or tape. Placing
the magnet close to the edge and in the middle will work best with
Lift the paper clips towards the bottom piece of cardboard one
at a time and observe what happens. The magnet will attract the
paper clips and they will hang from the bottom of the contraption.
If this doesn't happen, it may be because the magnet is too thick,
the dowels too large, or the cardboard is too thick.
If this happens, you can fix the situation by using another magnet
in addition to the one that is already there. By adding more paper
clips carefully, they will move into positions that have even spaces
between them. If you put a pencil in the middle of the sandwich,
nothing will happen. However, if you put a strapping tape or butter
knife in the middle and move it around, the paper clips should fall
What's happening is the magnetic fields from the magnet go through
both pieces of cardboard and the air. Non-metallic items like the
pencil that make the paper clips do nothing, are called non--permeable
objects. The butter knife on the other hand, will not allow the
magnetic field to pass through. Materials that gather magnetic lines
are called permeable and the term only refers to magnets.
Researchers in science try to copy the force of magnets using field
lines. A compass will show where field lines are. Iron will also
show were field lines are. You an view the field lines by using
iron filings and placing them onto a piece of paper that is covering
a magnet. Field lines begin at the north pole of a magnet and go
back to the south pole.
This is one of the most interesting of the 4th grade science fair
projects as it is very easy to assemble and to explain. It may not
be necessary to go as in-depth with the magnetic field explanation.
For a fourth grade science fair project, the basics of magnetism
Note: See the Disclaimer
before starting this project.