Download Investigation Test Review Sheet For Unit Test

Investigation Test Review Sheet
Here is a condensed version of all the previous
investigation reviews:
Electromagnets:
 You can increase the strength of an electromagnet by
o increasing the number of winds on the rivet (core)
o using tighter coiled wire around the rivet
o winding the coiled wire in one direction around
the rivet
o adding another d-cell in a series circuit; adding
another d-cell in parallel does not strengthen the
electromagnet
o Using a thicker wire around the rivet
 In order to build an electromagnet, you need the
following components:
o steel rivet (core)
o wires
o d-cell
o circuit base
o switch (for easy on and off)
Insulators/Conductors:
 Insulators are materials that DO NOT allow the flow of
electricity in a circuit. They include: plastics,
glass, foam, paper, rubber, wood, and other non-metals
 All conductors are made of metal. Conductors allow
electricity to flow throughout the circuit. They
include: wires, paperclips, nails, Fahnstock clips,
and other metals.
Series/Parallel Circuits:
 Series circuits have ONE pathway or flow of
electricity in a complete circuit. They are connected
in a circular shape.
 Parallel circuits have TWO or MORE pathways of
electricity flowing in a complete circuit. The energy
is SHARED between components and they are connected in
the shape of an 8.
Magnets:
 They stick (attract) to objects that contain iron or
steel.
 When two magnets come in contact (come toward each
other), they either attract (pull) or repel (push).
 When like poles (+,+ or -,-) come in contact they
repel.
 When opposite poles (+,- or -,+) come in contact they
attract.
 When you touch a piece of iron to a permanent magnet,
magnetism is induced in the piece of iron, and it
becomes a temporary magnet.
 The force of magnetism is stopped by thick objects
because distance weakens the magnetic force between a
magnet and another object or another magnet.