1. Unit :
Electricity
Topic :
Static
Electricity
Matthayomsuk

2. Physic

3. objecti
vetell which materials
To
are conductor and also
which materials are
insulators
To exemplify the
materials that cause
static electricity

5. vocabulary

6. electron

7. insulator

8. conductor

9. material

10. ELECTRICAL
CHARGES
Protons, neutrons and
electrons are very
different from each
other. They have their
own properties, or
characteristics. One of
these properties is
called an electrical

11. Protons have what we call a
"positive" (+) charge.
Electrons have a "negative"
(-) charge. Neutrons have
no charge, they are neutral.
The charge of one proton is
equal in strength to the
charge of one electron. When
the number of protons in an
atom equals the number of

12. ELECTRONS
CAN MOVE
The protons and
neutrons in the nucleus
are held together very
tightly. Normally the
nucleus does not
change. But some of
the outer electrons are

13. They can move from one
atom to another. An atom
that loses electrons has
more positive charges
(protons) than negative
charges (electrons). It is
positively charged. An atom
that gains electrons has
more negative than positive

15. Some materials hold their
electrons very tightly.
Electrons do not move
through them very well.
These things are called
insulators. Plastic, cloth,
glass and dry air are good
insulators. Other materials
have some loosely held

16. How can we move electrons
from one place to another?
One very common way is to
rub two objects together. If
they are made of different
materials, and are both
insulators, electrons may be
transferred (or moved) from

17. The more rubbing, the
more electrons move, and
the larger the static
charge that builds up.
(Scientists believe that it
is not the rubbing or
friction that causes
electrons to move. It is

18. Experime
nt on
Static
Electricit
y

19. Activit
y1
There will be an
experiment.
You have to follow the steps
below:
- Make a group of 4 people.
- The experimental
equipments are given for you.

20. Equipme
nts

21. a bottle
of water

22. a
plastic
cup

23. a
candl
e

24. plasti
c tube

25. a
handker
chief

26. a
spoon

27. a
straw

28. a
bowl

29. a stick

30. time to do
the
experiment
!

31. Step
1
One of each
group picks a
plastic cup up.

32. Step
2 Put a bowl on
the table.
Step
Hold a plastic
3 cup directly
above the
bowl.

33. Step Pour the water
4
in the bottle
into a plastic
Ste You .can see
cup
p5
the water is
dropping from
the plastic cup.

34. Another one of
Step
6 each group
picks a
Ste
Use a
handkerchief
p7 handkerchief
and stick up.
rub a stick as
fast long as
you can.

35. would like you
Step
8 to close the
stick to
Step dropping the
Everyone in
9 each group
water
observes or
notices what’s
happening

37. Static
Electricity
Static
Electricit
y
Static
Electricity

38. Static
Electricit
y
Static
Electricity