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Subido el 28 de abril de 2020 por Patricia D.

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Good morning, boys and girls. How are you today? I hope that everyone is okay and ready for a new 00:00:00
natural science class. So today we are going to talk about water. So if you have your book, 00:00:08
you can open your book on page 8 and 9. And if you are going to use the digital version of the book, 00:00:15
you can open this book on pages 80 and 81 okay so let's going to talk about water as i said 00:00:24
water is an example of matter and water has three main characteristics so let's going to see 00:00:34
the characteristics so water is odorless tasteless and colorless oh these words are very 00:00:43
difficult and new for us. So, let's go into explain these words little by little and step 00:00:54
by step. The first one, odorless. Let's go into see the meaning of odorless. Odorless 00:01:01
means no smell. So, if you take a glass of water and you smell this glass of water, you 00:01:13
can see that there is no smell so water is odorless okay so no smell if you have 00:01:22
also in the kitchen the possibility to smell a glass of orange juice you can 00:01:35
see the difference so please if you can take a glass of water and a glass of 00:01:42
orange juice you can see the difference right now. Let's going to analyze the 00:01:47
second word tasteless so tasteless is means no taste so if you have your 00:01:54
glass of water and you drink a little bit of this water you can see that is no 00:02:02
or you can feel that it's not salty or it's not sweet so the taste is nothing 00:02:09
so no taste for water and if you have your glass so for orange juice for example 00:02:16
you can see that this the taste is orange 00:02:22
so the taste the taste is different between the orange juice and water and finally colorless maybe 00:02:30
the easiest word so means no color so as you can see if you have your glass of 00:02:40
water is transparent is no color on it and if you see the glass of orange juice 00:02:48
obviously is orange so as a review as a quick review the three main 00:02:56
characteristics of water are odorless tasteless and colorless okay so it's going to continue 00:03:04
and we can find water in the three states of matter so this means we can find water 00:03:15
solid solid water we can find liquid water and we can find gas water okay even in at home it is easy 00:03:25
to find the three states of water so let's going to see the main characteristics of water is in a 00:03:35
gas state at temperatures over 100 degrees this means that the temperature is more than 100 okay 00:03:44
over the word the word over means more than 100 okay so imagine if you are helping in the cook 00:03:57
in the kitchen and you put some water on the fire and you can see some vapor is because this water 00:04:05
is over 100 degrees so this water is getting into gas okay 00:04:16
next so water is in a liquid state between 1 degree and 99 degrees okay so this is the 00:04:25
most common state of water so if you open the tap you can find liquid water 00:04:34
okay and finally water is in a solid state at temperatures below 0 degrees so 00:04:41
below means less than 0 okay so if you put some water into your freeze in the 00:04:49
kitchen you can have solid water. The last part of the class is about the 00:04:58
changes of a state in water. So here we have solid water and if we want to 00:05:07
transform this solid water into a liquid we need to heat the solid water, we need 00:05:17
to heat this solid water to change into liquid water so this process when solid 00:05:25
water changes into a liquid water it will melt so the water melts okay then 00:05:34
if we want to change liquid water into vapor water also we need to heat the 00:05:47
liquid water okay here we have the water vapor so we need to heat liquid water and it changed into 00:05:57
water vapor and this process is we say that water evaporates and also we do we can do the other way 00:06:21
around we can transform water vapor into a liquid we can see in a minute okay so when we 00:06:33
cold we need coal when we call water vapor here we are when we call water vapor 00:06:50
what this water vapor transforms into liquid and this process we say that water it condenses 00:07:01
And finally, if we cold liquid water, this water changes into a solid and this process, in this process, water freezes, water freezes, okay? 00:07:10
Subido por:
Patricia D.
Licencia:
Reconocimiento
Visualizaciones:
189
Fecha:
28 de abril de 2020 - 8:26
Visibilidad:
Público
Centro:
CP INF-PRI NTRA. SRA. DE LA MILAGROSA
Duración:
08′ 08″
Relación de aspecto:
1.78:1
Resolución:
960x540 píxeles
Tamaño:
44.57 MBytes

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