1
00:00:02,970 --> 00:00:08,929
Hello everybody! How are you? I know you have watched the videos and you have read

2
00:00:08,929 --> 00:00:13,810
the book so you know what matter is and now you know a little bit about mass and

3
00:00:13,810 --> 00:00:18,350
volume that are the properties of matter. So I just want to talk to you just a

4
00:00:18,350 --> 00:00:24,589
little bit, just a very short explanation about this topic, okay? What is mass? Mass

5
00:00:24,589 --> 00:00:30,289
is the amount of matter, okay? For example this lemon, the amount of matter of this

6
00:00:30,289 --> 00:00:35,450
lemon is measured in grams, in kilos but in this case as it is small we use grams

7
00:00:35,450 --> 00:00:44,030
and to measure it we use this thing that is the scale. So just to know the mass of

8
00:00:44,030 --> 00:00:49,909
this lemon we have to switch it on, put the lemon on it and now we know that

9
00:00:49,909 --> 00:00:59,210
it's 122 grams, okay? To know the volume, to know the volume is, remember is the

10
00:00:59,210 --> 00:01:05,689
the space that the object occupies how big or small it is there are many ways

11
00:01:05,689 --> 00:01:12,769
but for this kind of objects I would say that we have to use this okay we have a

12
00:01:12,769 --> 00:01:18,590
glass of with water and I don't know if you can see it but it has numbers saying

13
00:01:18,590 --> 00:01:27,409
the milliliters so now the water here is 400 milliliters so to know the volume we

14
00:01:27,409 --> 00:01:36,049
have to put the lemon in just pressing yeah and to know the difference of water

15
00:01:36,049 --> 00:01:51,829
so it was 400 and now is around 550 so the volume of this lemon is 150

16
00:01:51,829 --> 00:02:01,319
milliliters okay but we have to be careful because in general big things are heavier than small

17
00:02:01,319 --> 00:02:08,360
things for example we have the lemon and this bowl this one is bigger of course the volume is higher

18
00:02:08,360 --> 00:02:16,599
than this one but what about the mass this one we know that it's 120 grams let's see

19
00:02:16,599 --> 00:02:31,659
the mass of this ball have to stop it it says that it's 20 20 grams so this one this this

20
00:02:31,659 --> 00:02:43,360
ball is smaller and so the volume is lower and is lighter okay but sometimes the big thing can

21
00:02:43,360 --> 00:02:49,460
be lighter for example this foam ball it's bigger of course we can see the

22
00:02:49,460 --> 00:02:57,099
difference of size but when we measure with the scale we see that it's 31 grams

23
00:02:57,099 --> 00:03:04,479
that means this one is bigger okay but it's lighter and this one is the lemon

24
00:03:04,479 --> 00:03:14,879
is smaller okay the volume is shorter is lower but it's heavier the mass is higher than the ball

25
00:03:14,879 --> 00:03:24,099
and we have to be careful with this okay i think that's all i hope you have understood everything

26
00:03:24,099 --> 00:03:31,219
if you don't just ask me by email okay bye bye lots of kisses for you bye bye