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how are you today i'm happy to be here in order to finish the last unit of natural science so this

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is going to be the last class of this unit and i think it's pretty simple and something that you

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can know and imagine so for example let's going to start so machines and inventions

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uh here if you have your book you have to open your book on page 12 and 13 and if you have to

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the digital book i'm not sure about the page but you have it in the in the program okay in the

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program we upload every single uh week okay okay so let's going to talk about machines

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and sorry an invention so people use machines every day okay because as you as you remember

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machines help us in different ways and make easier some works for us so for example look at here

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let me see here so at home we can use different machines as you can see here in the picture so

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washing machines these washers vacuum cleaner iron okay these machines all these machines

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help us to do the housework in an easy way okay it's not the same washing your clothes

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with your hands one by one okay it's not the same as using the washing machine okay we can

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use machines as you can see here for communication nowadays we are using them a lot so we can use

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phones radios televisions computer tablets i don't know i can't imagine all the stuff and

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machine we can do for communication and also you are you are working on it nowadays because we are

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doing the classes in a digital way more transport is another another part of

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machines because we can use bicycles cars buses motorbikes trains planes okay

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in order to move from one place to another so they help us to move in an

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easy way so it's not the same going for example by bike okay than by car it's

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more it's faster it's easier for us using the car okay so these are machines

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that help us to move in an easy and faster way okay and also we can have

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machines for enjoyment or for enjoying our free time so we can imagine video

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So video games, video consoles, scooters, electronic books, okay?

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All the machines we can find in a fanfare or in an amusement park, okay?

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Because all the machines you go in and then move and the roller coaster, all this stuff are machines, okay?

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That help us to enjoy our free time, okay?

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Because you use your video consoles when you have free time or you go to an amusement park

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in your free time, okay?

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But we cannot forget that people use machines for doing their job, okay?

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As you can see here, it says people have different jobs.

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Simple and complex machines make their work easier.

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It's the same, okay?

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in this part is is not only for a job okay you can communicate with your friends you can of course

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you have to do do your the housework or you you can move to see your family okay but we also use

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machines when we are working so for example me now i'm using a computer for my work okay for my job

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in order to record this video for you for my students to enjoy the class so to know the class

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okay and um almost all jobs use computers so nowadays computer is a really really really

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really common tool or object or machine in a in a in a lot of jobs okay but we can have here

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we have here some examples of different jobs so for example mechanics use screw divers are here

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pliers spanners okay farmers use rakes structures and combined harvesters and doctors use

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sim rays x-rays and ultrasound machines okay so different machines in order to do a specific job

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because computers can be more general okay we can teachers can use a computer doctors can use

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a computer okay but these are specific tools for these jobs we you don't know you don't have to

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know every single object for every single job no it's only an example okay you need to understand

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that we use machines for free time for doing the housework for communication for traveling

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and for our jobs okay okay and now let me move a little bit

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sorry about that okay

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okay and here we are going to talk about safety when we use machines because machines are really

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dangerous okay because they don't they can see us and they can think okay so they are dangerous

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so we need to um we need to um follow some special safety rules so let's going to see

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the safety rules so workers must must wear a hard hat boots and gloves when they work on a

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construction site they should be always alert to danger okay so in this uh this rule is you need to

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use the appropriate clothes okay if you are going to use a machine maybe you need

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glasses or gloves or a hat okay you can't go in a in swimming suit okay

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if you are going to use a machine other one workers must wear a special mask over their

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mouth and glasses when they work with chemical substances okay as i have told you before maybe

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you need glasses or you need a mask okay so special costume special clothes for using

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these machines workers must protect their ears and their eyes and hands when they are used

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they use a road drill okay this is a really much a really horrible machine making a lot of noise

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okay so because of the noise we need to protect our ears and our eyes okay everyone must take a

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driving test before driving a car on the vehicle vehicles okay so these are safety

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rules okay and here we have some safety rules with electricity because electricity is at home

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it's something that we can use every single day okay as you remember we talked before about

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conductors and insulator but we have to be careful with electricity okay so pull on the plug

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on not the cable okay this is important we need to put on the the plug not the cable

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more use a hair a hair dryer with wet hands so we can't

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And, well, in this case, what should you do and what shouldn't do?

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Okay, so we should pluck, we should pull on the plaque, okay, not a cable.

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And we shouldn't use the hair dryer with wet hands, okay?

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And put my finger on the sucker.

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What do you think?

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Never, never, never.

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So, you shouldn't put your, well, you mustn't put your finger on a socket, okay?

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So, these are the safety rules.

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I think it's something logical, okay?

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And you know.

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And that's all for today.

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So, see you next class and I miss you a lot.

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Bye-bye.