unit 7 - electricity
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Electricity
5th Grade2015/2016
UNIT 6
What is electricity?
Electricity is all around us
What is electricity?
Atoms are made up of a nucleus and electrons.
The nucleus contains protons and neutrons.
Protons have a positive electric charge.
Neutrons have no charge.
Electrons have a negative electric charge.
Do you know…
Normally, objects are neutral. This means they have the same number of positive charges as negative charges.
What is electricity?
Normally, objects are neutral. This means they have the same number of positive charges as negative charges.
If an object has more positive charge than negative, we say it is positively charged.
What is electricity?
Normally, objects are neutral. This means they have the same number of positive charges as negative charges.
If an object has more positive charge than negative, we say it is positively charged.
If an object has more negative charge than positive, we say it is negatively charged.
Experiment
As the balloon and the hair are neutral…
a) They will attract each other.
b) They will repel each other.
c) Nothing will happen.
Experiment 1If we rub a balloon on our head, our hair will transfer ___________to the balloon.
Experiment 1So, the hair will be _________________ charged and the balloon will be _________________ charged.
Objects with opposite charges _____________ each other.
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