1
00:00:00,000 --> 00:00:09,779
Hello boys and girls, welcome to a new Natural Science Unit, Natural Science Unit 5, Lesson 2, States of Matter.

2
00:00:10,439 --> 00:00:18,980
Remember that you have this worksheet in your notebook with the different states of matter and some experiments

3
00:00:18,980 --> 00:00:26,460
to understand the shape and the volume of the different states of matter.

4
00:00:26,460 --> 00:00:42,979
States of matter. There are three states of matter. Gas, liquid, and solid. Gases, liquids, and solids.

5
00:00:43,979 --> 00:00:55,320
Let's understand the three states of matter using the example of water. We can find matter in three states.

6
00:00:56,460 --> 00:01:06,359
vapor of water or water is thin, water in a liquid state, drops of water, and water

7
00:01:06,359 --> 00:01:16,079
in a solid state as an ice cube or snow. But does this only happen or take place

8
00:01:16,079 --> 00:01:27,319
with water no as a gas example we have natural gas as a liquid example we have

9
00:01:27,319 --> 00:01:46,760
gas in the gas station or petroleum and as a solid example we have coal let's go

10
00:01:46,760 --> 00:01:54,959
back to the example of water can water change from one state to another yes it

11
00:01:54,959 --> 00:02:02,519
can. It's very important to bear in mind the different temperatures. When the temperature

12
00:02:02,519 --> 00:02:15,400
of water reaches 100 Celsius degrees or above, it turns into a gas. When the temperature of water

13
00:02:15,400 --> 00:02:25,780
is between 0 and 99 degrees Celsius degrees we can find it in the form of a

14
00:02:25,780 --> 00:02:36,400
liquid and finally when the temperature of water decreases below 0 Celsius

15
00:02:36,400 --> 00:02:44,840
degrees it turns into a solid the process of turning from gas to liquid

16
00:02:44,840 --> 00:02:55,099
water cools down. The same thing happens in the process of turning from liquid to solid. However,

17
00:02:55,099 --> 00:03:03,919
on the other hand, in the process of turning from solid to liquid and from liquid to gas,

18
00:03:03,919 --> 00:03:14,240
the temperature of water heats up. The changes of the state of water have a name. When water

19
00:03:14,240 --> 00:03:25,099
turns from gas into liquid, we call it condensation. When water changes from a

20
00:03:25,099 --> 00:03:36,439
liquid to a solid, we call it solidification. When water changes from a

21
00:03:36,439 --> 00:03:45,120
solid into a liquid, we call it melting. And finally, when water changes from

22
00:03:45,120 --> 00:03:55,580
liquid to gas we call it evaporation. In class we became scientists and

23
00:03:55,580 --> 00:04:01,680
experimented to understand the properties of the states of matter.

24
00:04:01,680 --> 00:04:14,400
experiments 3, 4 and 5. In experiment 3, gases, we learned that gases expand to

25
00:04:14,400 --> 00:04:22,319
fill the container. In experiment four, we learned that liquids take the shape of

26
00:04:22,319 --> 00:04:32,220
the container. In experiment five, we learned that the shape of solids doesn't

27
00:04:32,220 --> 00:04:49,819
change volume. Experiments six, seven, and eight. In experiment number six, we learned

28
00:04:49,819 --> 00:05:00,319
that gases don't occupy the same space as they can expand and contract. In

29
00:05:00,319 --> 00:05:10,639
experiment 7 we learned that liquids occupy the same space, equal space. In

30
00:05:10,639 --> 00:05:21,290
experiment number 8 we learned that solids occupy the same space. Thank you

31
00:05:21,290 --> 00:05:23,649
Thank you very much for listening, and goodbye.