1. Unit :ElectricityTopic :StaticElectricityMatthayomsuk 2.
Physic 3. objectivetell which materialsTo are conductor and also
which materials are insulators To exemplify the materials that
cause static electricity 4. vocabulary 5. electron 6. insulator 7.
conductor 8. material 9. ELECTRICALCHARGESProtons, neutrons
andelectrons are verydifferent from eachother. They have theirown
properties, orcharacteristics. One ofthese properties iscalled an
electrical 10. Protons have what we call a"positive" (+)
charge.Electrons have a "negative"(-) charge. Neutrons haveno
charge, they are neutral.The charge of one proton isequal in
strength to thecharge of one electron. Whenthe number of protons in
anatom equals the number of 11. ELECTRONSCAN 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
12. They can move from oneatom to another. An atomthat loses
electrons hasmore positive charges(protons) than negativecharges
(electrons). It ispositively charged. An atomthat gains electrons
hasmore negative than positive 13. Some materials hold
theirelectrons very tightly.Electrons do not movethrough them very
well.These things are calledinsulators. Plastic, cloth,glass and
dry air are goodinsulators. Other materialshave some loosely held
14. How can we move electronsfrom one place to another?One very
common way is torub two objects together. Ifthey are made of
differentmaterials, and are bothinsulators, electrons may
betransferred (or moved) from 15. The more rubbing, themore
electrons move, andthe larger the staticcharge that builds
up.(Scientists believe that itis not the rubbing orfriction that
causeselectrons to move. It is 16. Experiment onStaticElectricity
17. Activit y1There will be anexperiment.You have to follow the
stepsbelow:- Make a group of 4 people.- The experimentalequipments
are given for you. 18. Equipments 19. a bottleof water 20. aplastic
cup 21. acandle 22. plastic tube 23. ahandkerchief 24. aspoon 25.
astraw 26. abowl 27. a stick 28. time to dotheexperiment ! 29.
Step1One of each group picks a plastic cup up. 30. Step2 Put a bowl
onthe table.Step Hold a plastic 3 cup directly above the bowl. 31.
StepPour the water4in the bottleinto a plasticSteYou .can seecupp5
the water is dropping from the plastic cup. 32. Another one
ofStep6each group picks aSte Use a handkerchiefp7 handkerchief and
stick up. rub a stick as fast long as you can. 33. would like
youStep8to close the stick toStep dropping the Everyone in9each
group water observes or notices whats happening 34.
StaticElectricityStaticElectricityStaticElectricity 35.
StaticElectricityStaticElectricity
