1. Grade 9 Science – Unit 4 – Electricity #1 Atom Structure Electric Charges ChargingElectric Discharge More Charging 11111 22222 33333 44444 55555

2. All matter is composed of it.

3. What are Atoms?

4. They are negatively charged and they are found in orbits circling around the nucleus of the atom

5. What are Electrons?

6. These are found in the nucleus of the atom. Their charges are either positive or no charge.

7. What are Protons and Neutrons?

8. An object with an equal number of protons and electrons.

9. What is a Neutral Object?

10. These subatomic particles move in space AND they can be added or removed from the atom?

11. What are Electrons?

12. An object with more electrons than protons

13. What is a Negatively-Charged Object?

14. It is what objects with like charges do

15. What is Repel?

16. The force exerted by an object with an electric charge

17. What is Electric Force?

18. Objects with like charges repel each other and objects with opposite charges attract each other

19. What is the Law of Electric Charges?

20. An imbalance of electric charges on the surface of an object

21. What is Static Electricity?

22. Two different neutral materials are rubbed together so that electric charges are transferred

23. What is Charging by Friction?

24. A list of materials arranged in order of their tendency to gain electrons

25. What is the Electrostatic Series?

26. Charging a neutral object by bringing another charged object close to – but not touching – the neutral object

27. What is Charging by Induction?

28. Connecting an object to a large body that is capable of removing an electric charge from an object

29. What is Grounding?

30. Charging an object by contact with a charged object

31. What is Charging by Conduction?

32. A large hollow sphere resting on the insulting cylinder, and inside the cylinder, a belt stretched over two pulleys.

33. What is a Van de Graaff Generator?

34. These are placed on the roofs of tall buildings to provide a safe path for lightning to follow to reach the ground while not damaging the buildings

35. What is a Lightning Rod?

36. An electric discharge that occurs between clouds OR between clouds and the ground

37. What is Lightning?

38. Rapid transfer of electric charge from one object to another object

39. What is Electric Discharge?

40. There are an excess number of these particles at the bottom of a thunder cloud

41. What are negatively-charged water particles?

42. A material that lets electrons move easily through it

43. What is a Conductor?

45. What is Charging by Conduction?

47. What is Charging by Friction?

48. A shift in the position of electrons in a neutral object that occurs when a charged object is brought near it

49. What is Induced Charge Separation?

50. A material that does not easily allow for the movement of electrons through it

51. What are Insulators?