Activa JavaScript para disfrutar de los vídeos de la Mediateca.
Mixtures
Ajuste de pantallaEl ajuste de pantalla se aprecia al ver el vídeo en pantalla completa. Elige la presentación que más te guste:
Types of mixtures and separating mixtures
Hello kids! How are you feeling today?
00:00:00
Today I am feeling great, because later I am going to go out for the first time after two months.
00:00:03
Well, today in Natural Science we are going to learn about mixtures.
00:00:12
And before telling you what a mixture is, I will explain to you what a pure substance is.
00:00:18
What's a pure substance?
00:00:26
A pure substance has just one type of matter.
00:00:27
I will give you two examples.
00:00:33
Water is a type of pure substance and also salt.
00:00:35
Okay, now we will focus on mixtures.
00:00:41
What are mixtures?
00:00:46
A mixture happens when we put two or more substances together, when we mix them.
00:00:49
That's what we are doing here.
00:00:56
And there are two types of mixtures.
00:01:01
Mixtures can be heterogeneous or homogeneous.
00:01:04
For example, a homogeneous mixture is an orange juice and a heterogeneous mixture is a fruit salad.
00:01:08
Now we will see the difference between them.
00:01:20
What is a homogeneous mixture?
00:01:26
A homogeneous mixture is a type of mixture where you can't see and can't distinguish the different ingredients used to make the mixture.
00:01:28
For example, purée is a type of homogeneous mixture because we just see something yellow or green, but we can't see the ingredients that we used.
00:01:40
We can't see the potatoes, we can't see the onion, we can't see the different vegetables.
00:01:57
Coffee.
00:02:07
We can't see the ingredients that we used.
00:02:09
We just see something brown.
00:02:12
But we can't distinguish the milk from the coffee or the sugar.
00:02:14
What about the milkshake?
00:02:20
It's also homogeneous because we just see something pink.
00:02:23
but we can't see the ingredients that we used.
00:02:26
We can't see the strawberries, and we can't see the milk and the sugar.
00:02:30
What about chocolate?
00:02:37
To make chocolate, we use milk, chocolate, sugar,
00:02:39
and we can't see any of those ingredients.
00:02:44
We just see something wrong, the result.
00:02:48
Cold tomato soup.
00:02:51
in the cold tomato soup we use garlic, onion, tomato, bread, water and we don't see any of
00:02:52
those ingredients we just we just see something orange an orange liquid and finally the orange
00:03:03
juice we used oranges and water and also we used sugar but we didn't we cannot see any of those
00:03:10
ingredients. We just see something orange. What about heterogeneous mixtures?
00:03:19
Heterogeneous mixtures are the mixtures where you can see and distinguish the different ingredients.
00:03:28
For example, here we have a bowl of cereal with milk and you can see the milk and the cereal in
00:03:35
the bowl, so it's heterogeneous. Let's see more examples. A salad is a type of heterogeneous
00:03:45
mixture because you can see the lettuce, you can see the tomato, you can see the olives, you can
00:03:55
see the onions, you can see all the ingredients that you use to make the salad. A fruit salad is
00:04:01
also heterogeneous because you see the kiwi, you see the banana, you see the orange, you see the
00:04:07
strawberry you see the different ingredients a paella is also heterogeneous because you see
00:04:13
the prawns you see the rice you see the green pepper you see the red pepper you see the onion
00:04:20
you see all the ingredients that are used to make the paella milk and cereal is the same as i said
00:04:27
before and cocido you also see the different ingredients no you see the chickpeas you see
00:04:33
the chorizo, you see the potatoes, you see the meat. So it's also heterogeneous. Now we are going
00:04:40
to learn about how to separate mixtures. How can we separate mixtures? There are two types of
00:04:49
methods. There are two methods of separation. We can separate mixtures by evaporation or by
00:04:57
filtration. In evaporation, we have a homogeneous mixture, for example, water and salt. And when you
00:05:04
heat the mixture, the water evaporates and the salt remains on the plate, okay? What about
00:05:14
filtration? In filtration, you need a filter, okay? And you need a heterogeneous mixture
00:05:24
made by water and something solid like sand or pasta for example and to
00:05:34
separate it you need a filter and the water stays in the in the in the glass
00:05:43
of water and the sand or the pasta or the rice remains in the filter now we
00:05:51
will see two experiments about this let's see first the filtration experiment
00:05:59
Here you have a filter, lentils in a glass of water, a glass of water and a spoon.
00:06:06
Let's pour the glass of water, the water inside the lentil slice and stir it.
00:06:15
You stir it for some minutes and you can see that it's a heterogeneous mixture because
00:06:22
you can distinguish the water and the lentils.
00:06:30
And now you pick up the filter and pour the mixture and you will see that the water is
00:06:34
in the glass of water and the lentils remain in the filter.
00:06:45
Now let's watch an evaporation experiment.
00:06:51
We add some salt inside a glass of water and after that we stir the mixture.
00:06:59
Now you can see that it's a homogeneous mixture because you can't distinguish the ingredients
00:07:18
that have been used.
00:07:23
After that we are going to heat the mixture with fire.
00:07:26
And after some minutes, you can see that the water evaporated and the salt remains on the spoon.
00:07:35
That's the result.
00:07:46
The water evaporated and the salt remains on the spoon.
00:07:48
Okay, this is it.
00:07:55
This is everything that we learned today.
00:07:57
I hope you liked it.
00:08:01
And if you have any questions, you can ask Patrick or me.
00:08:03
See you later, alligators!
00:08:07
- Idioma/s:
- Autor/es:
- Noemí
- Subido por:
- Noemi C.
- Licencia:
- Todos los derechos reservados
- Visualizaciones:
- 249
- Fecha:
- 4 de mayo de 2020 - 9:00
- Visibilidad:
- Público
- Centro:
- CP INF-PRI NTRA. SRA. DE LA MILAGROSA
- Duración:
- 08′ 09″
- Relación de aspecto:
- 2.18:1
- Resolución:
- 1568x720 píxeles
- Tamaño:
- 283.51 MBytes