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Unit 4 Matter Lesson 1 - Contenido educativo

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Subido el 14 de abril de 2020 por Fernando Luis R.

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Welcome everybody, we are going to talk about natural science, the unit 4, matter. 00:00:00
What is matter? Matter is everything that surrounds us. 00:00:07
It's everything made out of atoms. 00:00:14
And we can find it in different stages. 00:00:17
we can find it in solid state, liquid state or gaseous state, okay? 00:00:21
Matter or solid, liquid and gases. So solids, what are the main characteristics 00:00:32
of solids? Solids hold shape and have fixed volume, it doesn't change the 00:00:43
volume of the solid liquids the shape they have it's because of the container 00:00:51
where are they and the volume is fixed it doesn't change the amount of space 00:01:00
that they use is always the same and gases the shape of the gas is the shape 00:01:07
of the container and the volume also is the shape of the container so why is that because we have 00:01:16
everything is made out of atoms so all the matter is formed is formed by atoms and atoms have 00:01:31
are tiny particles that form matter and they are formed of three different elements. They are 00:02:02
formed by electron, neutron and protons and because of that, because of the atoms that form the matter, 00:02:13
we see that the solid all the atoms have a specific order and they doesn't move in liquids 00:02:44
the atoms can move a little bit in gases the atoms move a lot because there's a lot of space between 00:02:57
the atoms. So we can classify the matter in two different types of matter. We have 00:03:08
pure substances and mixtures. Pure substances are made of one type of 00:03:20
molecule. A molecule is a group of atoms so molecules can be formed by one only 00:03:30
type of atom that we therefore we call it an elemental pure substance or a 00:03:53
combination of more than one atom, so we call it compound. Then we have the 00:04:04
mixtures that are formed by two or more different types of molecules that are 00:04:14
not chemically combined. And they can be homogeneous or heterogeneous. We're 00:04:24
going to see what does it mean. Homogeneous mixtures have a consistent 00:04:33
color and texture. All the compounds, all the substances that form the mixture are 00:04:44
distributed in a way that we cannot differentiate where does the one atom 00:04:54
starts and where does the other starts the two compound components of the 00:05:02
mixture and then we have the heterogeneous mixtures that we can see 00:05:07
with our eye the different components of the mixture we have one component we 00:05:16
have another and we can see that they are different for example the milk it's 00:05:23
an homogeneous mixture why because it is compound by more than one component for 00:05:35
example in meal we have water proteins we have lipids sugar etc and if we see 00:05:51
with our eye we cannot differentiate where is the water where are the 00:06:13
proteins where the lipids where's the sugar everything is the same but on the 00:06:24
other hand if we see this granite rock run it if we look with the eye we can 00:06:31
see that they have different components they have quartz they have and other 00:06:46
minerals that we can see here and here and with our eye we can see the 00:06:58
different components so it is a heterogeneous mixture so in other words homogeneous mixtures 00:07:18
have consistent color and texture every part of the mixture has the same properties 00:07:37
for another example of homogeneous mixture is the air it doesn't depend if we breathe the air here 00:07:47
or the breath that you're breathing in your room it will have the same elements oxygen nitrogen 00:07:56
and argon and although also other compounds and heterogeneous mixtures have different texture 00:08:03
and color. Each substance retains the properties of the beginning. For example, 00:08:17
concrete is a mixture of cement, water, sand and small stones and pebbles. You 00:08:27
can see in the picture that here you have the different pebbles in the 00:08:35
concrete and last but and last but not least we have the solutions what are the 00:08:47
solution it's a special type of a special type of homogeneous mixture in 00:08:58
which the one of the parts of the mixture is a liquid and the other 00:09:05
substances are, could be liquids, could be solids, so those other substances 00:09:13
are dissolved in the liquid. So we can differentiate between the solvent 00:09:23
that is the liquid and the solute that usually is the other components that 00:09:32
usually are solid or gases and then when you stir it up you move it you cannot differentiate 00:09:42
with the eye the parts the solvent and the solute so we have a homogeneous mixture 00:10:01
Idioma/s:
en
Autor/es:
Fernando Luis Rodríguez Huedo
Subido por:
Fernando Luis R.
Licencia:
Reconocimiento - No comercial - Compartir igual
Visualizaciones:
105
Fecha:
14 de abril de 2020 - 16:38
Visibilidad:
Público
Centro:
CP INF-PRI CALDERON DE LA BARCA
Duración:
10′ 23″
Relación de aspecto:
1.78:1
Resolución:
1280x720 píxeles
Tamaño:
61.28 MBytes

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