1 00:00:02,990 --> 00:00:23,510 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. 2 00:00:23,510 --> 00:00:42,509 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. 3 00:00:42,509 --> 00:00:50,789 okay but did the earth have something called axis okay you're going to see 4 00:00:50,789 --> 00:00:58,630 later what is that so remember the earth moves on an axis okay so it's not like 5 00:00:58,630 --> 00:01:07,480 this it's like this movement this is called rotation and one rotation takes 6 00:01:07,480 --> 00:01:24,140 You've seen the sunset, right? 7 00:01:24,180 --> 00:01:26,920 And if you get up early enough, maybe you've seen it rise too. 8 00:01:27,060 --> 00:01:30,879 But have you ever wondered, if the sun rises every day and sets every night, 9 00:01:31,219 --> 00:01:33,319 where does it go when we can't see it? 10 00:01:37,140 --> 00:01:38,239 Well, nowhere. 11 00:01:38,239 --> 00:01:40,400 It's actually us that goes somewhere. 12 00:01:40,400 --> 00:01:45,040 Because we're on the Earth, and our planet is always turning, or spinning, on its axis. 13 00:01:45,040 --> 00:01:50,239 Imagine a line passing through the center of the Earth, that goes both through the North Pole and the South Pole. 14 00:01:50,239 --> 00:01:52,480 We call that invisible line the axis. 15 00:01:52,480 --> 00:01:54,879 Earth spins around on this axis like a top. 16 00:01:54,879 --> 00:01:57,680 This spinning movement is called the Earth's rotation, 17 00:01:57,680 --> 00:02:00,640 and the Earth's rotation is what gives us day and night. 18 00:02:00,640 --> 00:02:02,079 Every day, all year. 19 00:02:02,079 --> 00:02:06,799 If you're on the side of the Earth that's facing away from the Sun, as the Earth is spinning, it's night. 20 00:02:06,799 --> 00:02:10,400 If you're on the side facing the Sun, it's, you guessed it, day. 21 00:02:10,400 --> 00:02:14,560 Now, hold on tight, because the Earth is actually moving in more ways than one. 22 00:02:14,560 --> 00:02:20,319 At the same time that the Earth spins on its axis, it also orbits, or revolves around, the Sun. 23 00:03:06,409 --> 00:03:18,030 all words, ok? You have rotation or revolution. It is when the Earth moves on its axis. So you choose 24 00:03:18,030 --> 00:03:29,229 rotation or revolution. Number two. The part of the Earth that has light is day or night. You choose day 25 00:03:29,229 --> 00:03:38,629 or night. The part of the day, sorry, the part of the earth that has no light is day 26 00:03:38,629 --> 00:03:48,990 or night. You choose day or night. And the last sentence. The earth turns once every 27 00:03:48,990 --> 00:04:01,490 36 or 24 hours. You choose between 36 or 24 hours. Now, in number 2, what do you have 28 00:04:01,490 --> 00:04:11,150 to do in number 2? Draw an arrow to show the light from the sun. Where is an arrow? This 29 00:04:11,150 --> 00:04:18,629 is an arrow, ok? You have to draw an arrow that shows the light from the sun. In this 30 00:04:18,629 --> 00:04:28,629 earth but take care okay pay attention this part of the earth is brighter than this one okay 31 00:04:29,430 --> 00:04:46,250 so think where is the sun is at the left or on the right okay so each day is 24 hours long okay 32 00:04:46,250 --> 00:04:57,529 That is the time that takes the Earth to spin in itself, 24 hours, ok? 33 00:04:57,529 --> 00:04:59,709 And the days have different parts. 34 00:04:59,709 --> 00:05:07,490 We have the morning, that's when the sun appears, we call it sunrise, ok? 35 00:05:07,490 --> 00:05:14,769 When the sun appears at sunrise starts the morning, then we have the afternoon, then 36 00:05:14,769 --> 00:05:24,889 we have the evening and then when the sun disappears that we call it sunset is night 37 00:05:24,889 --> 00:05:34,370 between the sunset and the sunrise okay here is the night but we also have another day 38 00:05:34,370 --> 00:05:43,870 midday midday is when the sun is high in the sky okay it's the highest point in the sky 39 00:05:43,870 --> 00:05:56,009 during the day. So imagine that the suns appear at 6 a.m., sorry 6 in the morning, then the 40 00:05:56,009 --> 00:06:07,069 midday will be 12 o'clock in the morning, and then disappears at maybe 6 in the afternoon, 41 00:06:07,069 --> 00:06:14,990 at six in the evening okay and then we start the night that's an example okay if you have the 42 00:06:14,990 --> 00:06:22,930 digital book you can be there if not you can listen now the number one so you just listen and say 43 00:06:22,930 --> 00:06:27,389 one listen and say 44 00:06:27,389 --> 00:06:31,790 The sun appears at sunrise 45 00:06:31,790 --> 00:06:42,819 The sun is high in the sky at midday 46 00:06:42,819 --> 00:06:54,750 The sun disappears at sunset 47 00:06:54,750 --> 00:07:03,189 Okay, for AC you only have to repeat what you already have written here 48 00:07:03,189 --> 00:07:05,829 The sun appears at sunrise 49 00:07:05,829 --> 00:07:09,449 The sun is high in the sky at midday 50 00:07:09,449 --> 00:07:11,829 The sun disappears at sunset 51 00:07:11,829 --> 00:07:29,730 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. 52 00:07:29,730 --> 00:07:44,870 Which sticker goes in sunrise? Which sticker goes in midday? Which sticker goes in sunset? 53 00:07:45,629 --> 00:07:52,470 I will go read that when we go back to school, so don't worry. 54 00:07:52,470 --> 00:08:19,269 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!