0
00:00:00,000 --> 00:00:06,000
Hi, today we are going to learn about energy.

1
00:00:06,000 --> 00:00:12,000
Our objectives for today is that our students, at the end of the lesson, are able to define

2
00:00:12,000 --> 00:00:20,000
energy, describe the two main forms of energy, and give examples of the two main forms of

3
00:00:20,000 --> 00:00:21,000
energy.

4
00:00:21,000 --> 00:00:29,000
But, here comes our first question, what do you use the word energy for?

5
00:00:29,000 --> 00:00:39,000
Talk to your partner and give at least three examples of when you use the word energy.

6
00:00:39,000 --> 00:00:45,000
When you eat, your body breaks the food down and gives you energy.

7
00:00:45,000 --> 00:00:52,000
When you are outside, the sun gives you energy in the form of light and heat.

8
00:00:52,000 --> 00:00:58,000
And the street lights use electrical energy to give us light.

9
00:00:58,000 --> 00:01:04,000
Talk to your partner again, do you know now something else about energy you didn't know

10
00:01:04,000 --> 00:01:05,000
before?

11
00:01:05,000 --> 00:01:10,000
So, what's energy?

12
00:01:10,000 --> 00:01:17,000
Well, energy is defined as the ability to do work.

13
00:01:17,000 --> 00:01:22,000
Energy is what makes things move, change and carry out work.

14
00:01:22,000 --> 00:01:29,000
You can jump, ride a bike and play because of energy.

15
00:01:29,000 --> 00:01:32,000
And what are the forms of energy?

16
00:01:32,000 --> 00:01:37,000
Well, to be honest, there are quite a lot of forms of energy.

17
00:01:37,000 --> 00:01:45,000
In this unit, we are going to study up to eight, but today we are going to focus on

18
00:01:45,000 --> 00:01:50,000
the main two, kinetic and potential.

19
00:01:50,000 --> 00:01:55,000
Look at this picture, what can you see in them?

20
00:01:55,000 --> 00:02:01,000
Yeah, the girl on the left is still, she's not moving.

21
00:02:01,000 --> 00:02:06,000
But the children on the right, they are moving.

22
00:02:06,000 --> 00:02:16,000
So the girl who is still has potential energy, she's not moving, she's still.

23
00:02:16,000 --> 00:02:25,000
While the boys, the children who are moving, they have kinetic energy.

24
00:02:25,000 --> 00:02:33,000
Potential energy is store energy, while kinetic energy is moving energy.

25
00:02:33,000 --> 00:02:34,000
Let's practice that.

26
00:02:34,000 --> 00:02:38,000
Look at the picture, is the ball moving?

27
00:02:38,000 --> 00:02:40,000
No, it's still.

28
00:02:40,000 --> 00:02:50,000
So if the ball is still, it's, yeah, that's right, potential energy.

29
00:02:50,000 --> 00:02:52,000
Check the bike now, is the bicycle moving?

30
00:02:53,000 --> 00:03:00,000
No, it's at the top of the hill, so the bicycle is not moving, potential kinetic.

31
00:03:00,000 --> 00:03:03,000
Yeah, that's right, potential too.

32
00:03:03,000 --> 00:03:13,000
But when the bike starts moving downhill, its potential energy becomes kinetic energy.

33
00:03:13,000 --> 00:03:15,000
Let's recap.

34
00:03:15,000 --> 00:03:24,000
If an object is still or stationary, it has store energy, also called potential energy.

35
00:03:24,000 --> 00:03:31,000
But if an object is moving, that is in motion, it has kinetic energy.

36
00:03:31,000 --> 00:03:37,000
The faster it moves, the more kinetic energy it has.

37
00:03:37,000 --> 00:03:41,000
Let's play a game, check this picture.

38
00:03:41,000 --> 00:03:44,000
Kinetic or potential energy?

39
00:03:44,000 --> 00:03:47,000
Is the arrow moving?

40
00:03:47,000 --> 00:03:49,000
No, it's not.

41
00:03:49,000 --> 00:03:51,000
Well done.

42
00:03:51,000 --> 00:03:54,000
Let's try this new one.

43
00:03:54,000 --> 00:03:56,000
Is the ball moving?

44
00:03:56,000 --> 00:03:59,000
Yeah, it's moving, so it must be kinetic.

45
00:03:59,000 --> 00:04:01,000
Well done.

46
00:04:01,000 --> 00:04:03,000
What about this other one?

47
00:04:03,000 --> 00:04:05,000
Is the bicycle in motion?

48
00:04:05,000 --> 00:04:05,000
Is it moving?

49
00:04:05,000 --> 00:04:07,000
Yeah, it seems so.

50
00:04:07,000 --> 00:04:09,000
Kinetic then?

51
00:04:09,000 --> 00:04:11,000
Yeah.

52
00:04:11,000 --> 00:04:12,000
What about this one?

53
00:04:12,000 --> 00:04:17,000
Is the pack moving or is it still?

54
00:04:17,000 --> 00:04:19,000
Still, potential then.

55
00:04:20,000 --> 00:04:22,000
Wow, we're on fire.

56
00:04:23,000 --> 00:04:24,000
And what about this one?

57
00:04:24,000 --> 00:04:27,000
Is the golf ball moving or still?

58
00:04:27,000 --> 00:04:30,000
It's still, potential then.

59
00:04:30,000 --> 00:04:30,000
Yeah.

60
00:04:32,000 --> 00:04:33,000
And what about the ball?

61
00:04:33,000 --> 00:04:36,000
Is the volleyball moving or is it still?

62
00:04:36,000 --> 00:04:38,000
Yeah, it must be moving, it's on the earth.

63
00:04:38,000 --> 00:04:44,000
Yay, well done.