Unit 5. Rotation - Contenido educativo

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Subido el 28 de abril de 2021 por Virginia M.

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So today in social science we open our book at page 72-73. We are going to learn what is rotation. So the rotation is the earth moving around itself. 00:00:02

Okay, the other day we said the Earth moving around the Sun. So today, the Earth moving around the Earth. Okay, remember, the Earth is always spinning and that causes the day and the night. 00:00:23

okay but did the earth have something called axis okay you're going to see 00:00:42

later what is that so remember the earth moves on an axis okay so it's not like 00:00:50

this it's like this movement this is called rotation and one rotation takes 00:00:58

You've seen the sunset, right? 00:01:07

And if you get up early enough, maybe you've seen it rise too. 00:01:24

But have you ever wondered, if the sun rises every day and sets every night, 00:01:27

where does it go when we can't see it? 00:01:31

Well, nowhere. 00:01:37

It's actually us that goes somewhere. 00:01:38

Because we're on the Earth, and our planet is always turning, or spinning, on its axis. 00:01:40

Imagine a line passing through the center of the Earth, that goes both through the North Pole and the South Pole. 00:01:45

We call that invisible line the axis. 00:01:50

Earth spins around on this axis like a top. 00:01:52

This spinning movement is called the Earth's rotation, 00:01:54

and the Earth's rotation is what gives us day and night. 00:01:57

Every day, all year. 00:02:00

If you're on the side of the Earth that's facing away from the Sun, as the Earth is spinning, it's night. 00:02:02

If you're on the side facing the Sun, it's, you guessed it, day. 00:02:06

Now, hold on tight, because the Earth is actually moving in more ways than one. 00:02:10

At the same time that the Earth spins on its axis, it also orbits, or revolves around, the Sun. 00:02:14

all words, ok? You have rotation or revolution. It is when the Earth moves on its axis. So you choose 00:03:06

rotation or revolution. Number two. The part of the Earth that has light is day or night. You choose day 00:03:18

or night. The part of the day, sorry, the part of the earth that has no light is day 00:03:29

or night. You choose day or night. And the last sentence. The earth turns once every 00:03:38

36 or 24 hours. You choose between 36 or 24 hours. Now, in number 2, what do you have 00:03:48

to do in number 2? Draw an arrow to show the light from the sun. Where is an arrow? This 00:04:01

is an arrow, ok? You have to draw an arrow that shows the light from the sun. In this 00:04:11

earth but take care okay pay attention this part of the earth is brighter than this one okay 00:04:18

so think where is the sun is at the left or on the right okay so each day is 24 hours long okay 00:04:29

That is the time that takes the Earth to spin in itself, 24 hours, ok? 00:04:46

And the days have different parts. 00:04:57

We have the morning, that's when the sun appears, we call it sunrise, ok? 00:04:59

When the sun appears at sunrise starts the morning, then we have the afternoon, then 00:05:07

we have the evening and then when the sun disappears that we call it sunset is night 00:05:14

between the sunset and the sunrise okay here is the night but we also have another day 00:05:24

midday midday is when the sun is high in the sky okay it's the highest point in the sky 00:05:34

during the day. So imagine that the suns appear at 6 a.m., sorry 6 in the morning, then the 00:05:43

midday will be 12 o'clock in the morning, and then disappears at maybe 6 in the afternoon, 00:05:56

at six in the evening okay and then we start the night that's an example okay if you have the 00:06:07

digital book you can be there if not you can listen now the number one so you just listen and say 00:06:14

one listen and say 00:06:22

The sun appears at sunrise 00:06:27

The sun is high in the sky at midday 00:06:31

The sun disappears at sunset 00:06:42

Okay, for AC you only have to repeat what you already have written here 00:06:54

The sun appears at sunrise 00:07:03

The sun is high in the sky at midday 00:07:05

The sun disappears at sunset 00:07:09

Ok, now you can use your sticker. I know you love the stickers so quickly go to the end of the book and find the symbol with the 73 for the stickers. Take the three stickers and complete. 00:07:11

Which sticker goes in sunrise? Which sticker goes in midday? Which sticker goes in sunset? 00:07:29

I will go read that when we go back to school, so don't worry. 00:07:45

And that will be everything for today. You are going to have more videos about this on the Alba Virtual and if you can, you can do some experiments. For example, using a balloon. You can take a balloon, you can take a lamp and try to make this kind of movement to see by yourself. Bye bye! 00:07:52