1. UNIT 4.
SCIENCE
ELECTRICITY
C.E.I.P
VALDELECRÍN

2. 1.DEFINITION OF
ELECTRICITY
 Electricityis a formofenergy observable in positive
andnegativeformsthatoccursnaturally ( as in
lightning) orisproduced ( as in a generator)
andthatisexpressed in
termsofthemovementsandinteractionofelectrons

3. ELECTRICAL CONDUCTORS
AND INSULATORS
 Materialsthatallowelectricityto pass through are
calledelectricalconductors. Materialsthat do
notallowelectricityto pass through are
calledelectricalinsulators.
 Examplesofconductors are: scissors, papel
clip, aluminumfoil, iron, steelandcopper
 Examplesofinsulators are:
cotton, paper, plastic, glassandruber

4. ELECTRICAL
CIRCUITS
 Thepaththatelectricityflows round iscalledcircuit.
Thecircuitmust be complete
toallowtheelectricitytoflow

5. ELECTRICITY :
DANGERS
 Electricity can be verydangerousifitisnotusedproperly
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