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Hi kids, this is me again, ok, I'm going to send you this second video, and this second

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video is to talk about matter in general, like in the first one, we're going to speak

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about water, the states of water, ok?

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The first thing, is water matter?

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What do you think?

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Of course, no?

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We said the other day that everything is matter, everything around us is matter, in this case

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water.

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If I can tell you, ok, what is the situation, what is the state of water, is it solid, liquid

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or gas?

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Most of you are going to say, Oscar, it's liquid, it's liquid, and it's true, but water

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cannot be only in a liquid state, water has three states, how is that possible?

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Look, how can we find water in a solid state?

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Very easy, if you think, do you have near you a situation where you find the water in

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a solid state?

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Of course, I saw you in the first video, this is water in solid, ok, this is ice, so when

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you freeze the water, it's very cold, it's converted into solid, ok?

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The regular liquid, the water in a liquid state, normally in nature we can find two

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situations, we can find fresh water that we find in rivers, lakes, ponds, different places,

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and salt water that we find in oceans and in seas, no?

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Ok, and the third one, gas water, we have gas water, is it possible?

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Ok, let's think, what happens in winter when you are having, it's very cold, and you are

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having a very hot shower in the bathroom, what happens in the mirror, for example, when

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you finish the shower, what happens in the mirror?

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Ah, the mirror, it has something like, you cannot see in the mirror, because you have

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something there, ok, this is the gaseous water, the gas water, that's why you can paint in

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the mirror, ok, because it's very hot, and the water is converted into gas, ok?

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Ok, but that is the three possible states, solid, liquid or gas, can we change from one

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state to another state, of course, for example, so, I have here a piece of ice, ok, and in

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a few minutes this ice is going to disappear, how is it possible that it disappears?

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Ok, because in here, in this bedroom, it's hot, it's getting hot, and to be nice, you

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have to be very very cold, so what happens to the ice?

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The ice is melting, the reducing, the ice is melting and in a few minutes it's going

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to convert it into water, ok, it's going to convert it into liquid water, ok, so if I

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want to pass from solid to liquid, I have to hot the water, can I convert the liquid

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water into gas water?

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Yes, I already explained you, if you heat the water, so you put the hot water in the

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shower, you are going to convert the water into gas, and this process is called evaporation,

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the water evaporates, ok, that's why you can touch in the mirror, ok?

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Ok, let's think the other way, can I convert gas water into liquid water?

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Of course, of course, that's what happens, for example, well, in the same example, ok,

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the hot water evaporates, but the thing that you can touch in the mirror is converted into

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liquid, that's why you can touch it, because when you stop the shower, the hot water finishes,

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ok, it starts to be, the bathroom is cold, and this is called condensation, this liquid

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that is converted in the mirror is called condensation, or for example in the cars,

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in winter as well, sometimes you touch the windows of the car and you have liquid, why?

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Because the gas is getting cold and is converted into liquid water, ok?

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Can we convert liquid water into ice?

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Very easy, no?

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If I put a piece of liquid gas, sorry, liquid water into the fridge, you can get ice, no?

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What is the name of this?

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Solidification.

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So we have four different processes, melting, evaporation, condensation, when gas is converted

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into liquid water, or solidification, when it changes the liquid water into solid, into

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ice, ok?

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Well, this is the stage of water, and I hope you understand, we are going to continue talking

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about that in the next video conference, I hope you like it, and see you soon, ok?

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Bye bye!