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LearningTranscript
00:00hi kids today we will learn about energy so let's start
00:10why do we eat food we eat food because we need energy for our daily activities
00:21like thinking walking sleeping playing or doing any kind of work we need energy
00:35we need energy to grow up all living things plants and animals need energy to
00:49grow up and they get that energy from the food they eat do you know how plants
00:58get energy to grow up plants get energy from the water sunlight and soil every
01:10change like melting of ice freezing of water blowing of air drying up clothes
01:21just every change every activity requires energy now let's see where this
01:31energy comes from or let's learn about the different sources of energy if we
01:41switch on the fan it starts running from where does it get energy it is running
01:49because of electrical energy if we heat water it starts boiling because of heat
01:59energy vehicles or cars bikes they get energy from fuel like petrol or diesel
02:13microwaves gets energy from electricity to cook and heat food we run a bicycle using
02:26our muscular energy our clothes are dried up either using the heat energy from the
02:35sun or wind or we dry them up in machines using the electrical energy so every change
02:47from our doing work our playing our sleeping our thinking or any physical change like melting
03:00of ice drying up of clothes running a fan all requires energy one or the other form
03:12of energy now let's answer some questions where do you think the cow gets energy from
03:23the cow will get energy from the food she eats a kite flies high in the sky where do
03:33you think it's getting energy from it's getting energy from the wind a toaster where do you think
03:46it's getting energy from it's getting energy from electrical energy this is a car what does it need
03:58to run or what is the source of energy for it fuel yes fuel is the energy for cars now here
04:15four activities are shown which of the following activity does not need energy let's figure it out
04:25first one boys are playing they definitely need energy for playing and they need food for that
04:37second one is a running fan definitely it needs some energy and it needs electrical energy third
04:52one is a book line on the table do you think it needs some energy to lie on the table no a book
05:03doesn't require any energy to lie on the table so this is the answer the fourth one is a boy
05:15a book definitely the boy needs energy to read the book so our answer is option C kids do you
05:28know what is the principal source of energy principal source of energy is the Sun that is
05:39all different sources of energy that we learned derives energy directly or indirectly from the
05:48Sun so the Sun is the principal source of energy for all sources of energy and we will learn how
06:00it is in our next grades so kids today we learned a lot about energy now you may go
06:10ahead and take a quiz to learn more bye-bye