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Machines
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Good morning, boys and girls. How are you today?
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I'm so happy to be here with you again because we are going to start a new unit.
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We are going to start Unit 7 of your books, your physical books, okay?
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And it's Unit 6 in the digital book, okay?
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Otherwise, you can follow the title, okay?
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That is Machines and Inventions, okay?
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I hope you will enjoy this unit and learn a lot.
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Let's going to start.
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So, what are machines?
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So, I'm going to tell you.
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Machines or a machine is an instrument that makes work easier, okay?
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A machine is something that we use to make our life easy, okay?
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To help us.
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It's a machine that helps us to do something.
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okay if you look at the pictures what or how many machines can you see here in
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the picture I'm going to leave or or maybe a better idea is you can stop the
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video here and tell or write how many machines can you see here okay now you
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can stop the video and I'm going to continue with the solution so you can
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check your answers so here we can see a clock that is number six a clock is a machine a computer
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of course number seven is a machine a mobile phone of course is a machine a pencil sharpener
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is another machine scissors and the skateboard and also i miss here in my in my presentation a bike
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i completely miss number two bike or bikes because there are a lot all these things are machines
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okay because they make our life easier for example with mobile phones we can communicate with people
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in an easy way and also people around the world so you can call
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um china if you want okay if you think in a bike you can move from one place to another with a bike
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in an easy way the same with the skateboard and if you think in scissors or a pencil sharpener
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also they make our life life easy okay easier there are two types of machines okay we can
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classify machines in two big groups the first one are called simple machines they have one or two
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parts okay for example if you think in a pencil pencil sharpener they they have two parts the
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the part that sharpen the pencil and the plastic part with um that allow us to take with your
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fingers safety okay example or if you if you think in a bottle opener it's only one part
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okay to open a bottle and the second group they are complex machines they have more than two parts
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okay and sometimes or most of the times they are the combination of different simple machines
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so think in a in a washing machine a washing machine is made of
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a lot of little little little part and a lot of other simple machines a motor the bottoms
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something the electrical part with the panel a lot of simple machines okay so clear
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simple machines they have one or two parts and complex machines they have more parts okay they
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have and and sometimes they are the combination of of some or more than one machine okay
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can you see the difference i think it's easy and simple to see the differences only with a picture
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okay the machines use energy so let's going to see some machines can that can help us to move
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around use fuel burn fuel burn means fire okay burns quemar okay other machines use the energy
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from the sun from the wind and from the water some machines use the energy from people from us
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like for example the scissors or the pencil sharpener of course and finally some machines
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use electricity the most common one i think for you are the electricity the ones that use
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electricity okay and talking about electricity we can have some materials such as metal
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waters trees and people that are conductors what's the meaning of conductors so electricity
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flows through these materials okay they can pass the electricity so for example if you
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you guys you boys and girls touch um something with electricity the electricity move around the
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body and it's so dangerous so be careful and don't do it never and all the materials such as plastic
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glass rubber rubber is there if you see the picture you can see rubber is the material
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for wheels okay block the flow of electricity okay the electricity doesn't pass through these
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materials they are called insulators okay so conductors they can or they allow the electricity
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pass through them passes through them and insulators block the electricity so the electricity
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can't pass it pass through them okay yes clear i'm going to make a short review
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so machines are the instruments that make our life easier okay two types simple machines and
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complex machines simple machines one or two parts complex machines more than two parts okay
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they can they can use fuels sun wind and water they can use the energy from people and of course
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they can use electricity i'm talking about electricity we have some materials that allow
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the electricity the liquid sorry the electricity passes through them so these are conductors
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and other materials block the electricity okay so they are insulators okay guys so this is
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everything uh this that's all for today okay so enjoy your day and be good guys and boys and girls
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- Subido por:
- Patricia D.
- Licencia:
- Reconocimiento
- Visualizaciones:
- 121
- Fecha:
- 18 de mayo de 2020 - 22:53
- Visibilidad:
- Público
- Centro:
- CP INF-PRI NTRA. SRA. DE LA MILAGROSA
- Duración:
- 07′ 58″
- Relación de aspecto:
- 4:3 Hasta 2009 fue el estándar utilizado en la televisión PAL; muchas pantallas de ordenador y televisores usan este estándar, erróneamente llamado cuadrado, cuando en la realidad es rectangular o wide.
- Resolución:
- 960x720 píxeles
- Tamaño:
- 67.18 MBytes
