1. What are atoms?
Learning target: I will be able to describe the Bohr model of atoms.

2. The universe's building blocks.
All matter is made
of atoms.
The universe's building blocks.

3. Nucleus
Shells

4. What are atoms made from?
Learning target: I will be able to explain correctly the different
parts of an atom.

5. + Protons * Positive charge Mass of 1 amu. * Found in the nucleus.
Atomic number
Protons

6. Found in the outer shells.
* Negative charge
* No mass. -
Found in the outer shells.
Electrons

7. Protons + Neutrons = atomic mass
* No charge.
* Found in the nucleus.
* Mass 1 amu.
Neutrons
Protons + Neutrons = atomic mass

8. Are all atoms the same?

9. No!

10. What do atoms look like?

11. Atom Activity Is that always true of neutrons? ISOTOPE???
What did you notice about the number
of protons and electrons?
Is that always true of neutrons?
ISOTOPE???

12. How do we use a periodic table?
Learning target: I will be able to use the periodic table to get
information about elements.

13. saying: Opposites attract?
Have you ever heard the
saying: Opposites attract?
Where does it come from?

14. What is a magnet?
Learning target: I can explain how magnets work.

15. A magnet is made when All Atoms are made to face the
same Direction.

16. Opposites attract like repel.N S
Opposites attract like repel.

17. Electromagnetic
field

20. More on magnets later.
But first....
What is electricity?

21. Which sub atomic particle do you think electricity is linked to?

22. Ok you guess it...
Electrons of course! e -

23. Atoms should equal.
Same number or protons
and electrons. + -

24. Sometimes they become
Charged. + _ Or

25. That means they either gain or lose electrons.
So they become positive or negative..

26. When an element becomes Charged it is called an Ion.+ Na
NaCl - Cl

27. How do they become charged?
Learning target: I can explain how atoms become charged
and how this can lead to electricity.

28. How do Atoms become charged?
Activity 1
* Collect a balloon and a few pieces of tissue
paper.
Now blow the balloon up and rub it on your head or sweater fast for 1 minute.
* Now bring the balloon close to the Tissue
paper. What happens?

29. Again rub your balloon on your sweater as fast as you can for 1 min.
Activity 2
Again rub your balloon on your sweater as fast as you can
for 1 min.
This time I would like you to place the balloon on the wall or
the ceiling?
What happens?

31. Friction
The electrons are literally rubbed of the atom!

32. The charge is passed by physical contact.
Conduction
The charge is passed by physical contact.

33. Induction charging is a method used to charge an object without actually touching the object to any other charged object.
Induction

34. Why electrons?

35. What do we call
the movement
of electrons?

36. This flow of electrons
is called a current.

37. The movement of these electrons is electricity. - - e - - e e e

38. Sometimes electrons get pulled off an atom but,
they do not move. - - - - - -
This is Static electricity.
Learning target: I will be able to explain static electricity and
how it can impact living things.

39. Van De Graff generator
Friction
Induction
Conduction

40. Friction
Induction
Conduction

41. Where do we experience static electricity in our lives?

42. The electons build up. - - - - The ground is positive + + + + + + + +

43. What could possibly happen??
It discharges of course.

44. Lightning dangers!

45. Back to current e e e e e
The flow of electrons.

46. and is measured in Amps (A).
When these electrons e
move it is called current.
and is measured in Amps (A).

47. electrons have is called
How much energy these
electrons have is called
VOLTAGE.
This is measured in VOLTS(v).

48. Circuits Learning target: I will be able to construct and compare
series and parallel circuits.

49. What are circuits?
Battery +
Wires
light bulb

50. Series : ONE AFTER ANOTHER
There are two types.
Series : ONE AFTER ANOTHER
Parallel: CIRCUIT SPLITS.
Learning target: I will be able to construct and compare
series and parallel circuits.

51. Allows electricity to pass.
Conductors
Allows electricity to pass.
Insulators
Does not allow electricity to pass.

52. * The primary difference between DC and AC is the direction of current flow.
* In a DC circuit, all electron current flow is in one direction.
. *In an AC circuit, current flows CHANGES DIRECTION.
An example of DC is the output of a battery. An example of AC is the power present in a home electrical system.

53. Why were some bulbs brighter?
Learning target: I can explain the difference between conductors,
insulators and semi conductors.

54. But why ???? Learning target: I will be able to explain the link
between voltage, resistance and
current.

55. Resistance The electrons have to fight to flow.
It opposes movement of electrons.

56. Resistance is measured in ohms.
Symbol
Unit

57. Current is measured in Amps.
The number of electrons is called current.
Current is measured in Amps. I
symbol A
unit

58. Voltage is measure in volts.
Voltage is the amount of energy
The electrons have.
Voltage is measure in volts. V
unit &symbol

59. They are all showing what????

60. Resistance…..
Ohm's Law
The amount of fight a system puts up the few electrons
can pass. That means Increase resistance reduce current!

61. v I R Resistance = Voltage ÷ Current Current = Voltage ÷ Resistance
Voltage(V) = Current (I) x Resistance (R)

62. Electromagnets
Learning target: I will be able to make an electromagnet and
explain how it works.

63. Magnets we can switch on and off!
We can make them more or less powerful!
Activity

64. Uses of electromagnets?
All motors require electromagnets.

65. MRI