1 00:00:06,059 --> 00:00:11,039 Good morning, guys. I'm going to tell you what we're doing today for Natural Sciences. 2 00:00:12,179 --> 00:00:19,620 So, as usual, we click in Mi Clase, we go to Content, we click on Natural Sciences Book, 3 00:00:20,219 --> 00:00:30,579 go in into Unit 5 Forces, and today we are going to see magnetism. But we are not going to see it 4 00:00:30,579 --> 00:00:39,460 the plus zone because it's too short i need to explain all the information so i will explain it 5 00:00:39,460 --> 00:00:43,299 straight through the page okay so 6 00:01:00,579 --> 00:01:23,920 And okay, so we're going to see about magnetism, okay, that we seen two days ago, we said that magnets have a force that is called magnetism, okay, so it can be, it may push or it may pull, okay, this is what we call attract or repel, all right. 7 00:01:23,920 --> 00:01:33,799 and well magnetism remember that is a non-contact force because move objects without touching them 8 00:01:33,799 --> 00:01:41,620 okay some of them are natural like the magnetite they are a mineral that we have seen in the 9 00:01:41,620 --> 00:01:49,219 in the class i don't know if you remember that and but most of them are man-made man-made they 10 00:01:49,219 --> 00:01:51,859 are made by men, OK? 11 00:01:51,859 --> 00:01:57,200 So they are made from iron or steel, OK? 12 00:01:57,200 --> 00:02:01,459 So this would be the typical magnet, all right? 13 00:02:01,459 --> 00:02:07,980 So because of magnetism, so we have the typical nails moving 14 00:02:07,980 --> 00:02:13,979 towards the magnet, or there is the repulsion strength, 15 00:02:13,979 --> 00:02:19,800 There's a repulsion force that avoids these magnets to join, 16 00:02:19,800 --> 00:02:24,120 or the magnets of the fridge, or this girl 17 00:02:24,120 --> 00:02:28,860 with the typical game of fishing. 18 00:02:28,860 --> 00:02:33,879 And also very important that we've seen in the past, 19 00:02:33,879 --> 00:02:39,219 the needle on the compass always points north because 20 00:02:39,219 --> 00:02:43,699 of the Earth magnetism, all right? 21 00:02:43,699 --> 00:02:51,060 So how does a magnet work? Magnets create a magnetic field around them. 22 00:02:51,060 --> 00:02:54,740 We cannot see it, okay, but there are attraction 23 00:02:54,740 --> 00:03:03,669 and repulsion forces working. So this is a photo of a magnet 24 00:03:03,669 --> 00:03:09,990 and iron fillings, okay. The iron fillings show us the magnetic 25 00:03:09,990 --> 00:03:14,710 field. I will include a video about how a 26 00:03:14,710 --> 00:03:24,469 magnetic field works, all right? And then, as we all know, because I'm sure you know it, 27 00:03:24,469 --> 00:03:32,150 all magnets have two ends, all right? The north pole and the south pole. If we put north pole 28 00:03:32,150 --> 00:03:40,069 and south pole in contact, they attract, okay? They attract each other, but same poles, 29 00:03:40,069 --> 00:03:47,030 north and north or south and south they repel all right this is very important 30 00:03:47,030 --> 00:03:53,669 okay so in this case if there are different poles or opposite poles they attract each other 31 00:03:53,669 --> 00:03:59,750 if it's the same poles they repel each other all right in espanol 32 00:04:10,069 --> 00:04:22,370 magnetism is a force of no contact of agreement because it moves objects without touching them we have 33 00:04:22,370 --> 00:04:27,050 magnets that are natural that are minerals like the magnet that when we were seeing the 34 00:04:27,050 --> 00:04:33,829 minerals we saw a magnet in class and we also have those that are man-made that are made by 35 00:04:33,829 --> 00:04:38,829 man agree that they are artificial and that they are usually made of iron or 36 00:04:38,829 --> 00:04:47,569 steel according to magnetism makes the nails stick to the magnet or that 37 00:04:47,569 --> 00:04:54,209 the child cannot join these two magnets that I cannot join these two 38 00:04:54,209 --> 00:04:59,389 magnets because there is a force of repulsion between them or the magnets of the 39 00:04:59,389 --> 00:05:05,990 fridge or the magnets of this typical game that is to fish that there is a magnet 40 00:05:05,990 --> 00:05:12,649 in the rod and a magnet in the fish and then you have to lift the fish without touching it with 41 00:05:12,649 --> 00:05:18,110 your hands but the example of the compass is also very important, because the 42 00:05:18,110 --> 00:05:24,769 needle of the compass always points to the north because it is attracted by the magnetic north of 43 00:05:24,769 --> 00:05:30,050 the earth okay it is the magnetism of the earth ok that the earth has magnetism 44 00:05:30,050 --> 00:05:34,490 also good and then let's see how it works 45 00:05:34,490 --> 00:05:37,269 a magnetic field 46 00:05:37,269 --> 00:05:42,949 because magnets create a magnetic field that is the magnetic field is a 47 00:05:42,949 --> 00:05:48,089 magnetic field that cannot be seen however there is an experiment that 48 00:05:48,089 --> 00:05:56,949 consists of rubbing iron filings that are these iron fillings iron fillings around we put 49 00:05:56,949 --> 00:06:05,790 the iron filings around the magnet and we are seeing how the filings are arranged 50 00:06:05,790 --> 00:06:11,550 because they are always arranged in a way with a kind of drawing of agreement this I am going to add 51 00:06:11,550 --> 00:06:17,009 a video so that you can see how a magnetic field is I am going to put a youtube video so that 52 00:06:17,009 --> 00:06:23,629 you see it okay and well and the last thing because we always know that we already know for sure 53 00:06:23,629 --> 00:06:30,389 most of the magnets always have a north pole and a south pole and it is something curious I did not 54 00:06:30,389 --> 00:06:36,029 explain it in English because if you and a magnet that has a north pole and a south pole you split it in half 55 00:06:36,029 --> 00:06:41,370 because what we get is to have two magnets with a north pole and a south pole, that is, a north pole is always 56 00:06:41,370 --> 00:06:47,589 genera un polo norte y un polo sur de acuerdo y entonces lo que sabemos pues 57 00:06:47,589 --> 00:06:53,629 que dos y dos imanes que se acercan por los polos opuestos se atraen de a track 58 00:06:53,629 --> 00:07:00,550 y dos imanes que se acercan por el mismo polo se repelen o sea que aquí hay un a 59 00:07:00,550 --> 00:07:08,670 una fuerza de atracción y aquí hay una fuerza de repulsión ok this could be all 60 00:07:08,670 --> 00:07:23,769 for the magnetism. So now we would go back and go to the plus zone, again go to 61 00:07:23,769 --> 00:07:32,850 the digital activities and we would do activity three, drag the words, drag the 62 00:07:32,850 --> 00:07:42,310 words to the sentences and 4. Are these sentences true or false? ¿De acuerdo? En la 3 tenemos que 63 00:07:42,310 --> 00:07:50,029 mover las palabras para rellenar los huecos y en la 4 leer las frases y decir si son 64 00:07:50,029 --> 00:07:55,290 verdaderas o falsas. Y esto sería todo por hoy. ¡Un saludo a todos!