Source Of Energy

Watch Source Of Energy - Edu-Primes on Dailymotion

Transcript

00:00Why do we eat food? We eat food because we need energy for our daily activities

00:10like thinking, walking, sleeping, playing, or doing any kind of work. We need energy.

00:25We need energy to grow up. All living things, plants and animals, need energy to

00:38grow up and they get that energy from the food they eat. Do you know how plants

00:48get energy to grow up? Plants get energy from the water, sunlight, and soil. Every

00:59change like melting of ice, freezing of water, blowing of air, drying up clothes.

01:11Just every change, every activity requires energy. Now let's see where this energy comes

01:21from or let's learn about the different sources of energy. If we switch on the fan, it starts

01:32running. From where does it get energy? It is running because of electrical energy. If

01:43we heat water, it starts boiling. Because of heat energy, vehicles or cars, bikes, they

01:55get energy from fuel like petrol or diesel. Microwaves get energy from electricity to cook

02:09and heat food. We run a bicycle using our muscular energy. Our clothes are dried up either using the

02:23heat energy from the sun or wind or we dry them up in machines using the electrical energy. So

02:35every change from our doing work, our playing, our sleeping, our thinking, or any physical change

02:47like melting of ice, drying up of clothes, running a fan, all requires energy. One or the other form

03:01of energy. Now let's answer some questions. Where do you think the cow gets energy from? The cow

03:13will get energy from the food she eats. A kite flies high in the sky. Where do you think it's

03:23getting energy from? It's getting energy from the wind. A toaster. Where do you think it's

03:35getting energy from? It's getting energy from electrical energy. This is a car. What does it

03:47need to run or what is the source of energy for it? Fuel. Yes, fuel is the energy for cars. Now

04:03here four activities are shown. Which of the following activity does not need energy? Let's

04:13figure it out. First one, boys are playing. They definitely need energy for playing and they need

04:25food for that. Second one is a running fan. Definitely it needs some energy and it needs

04:38electrical energy. Third one is a book lying on the table. Do you think it needs some energy to

04:48lie on the table? No, a book doesn't require any energy to lie on the table. So this is the answer.

05:00The fourth one is a boy reading a book. Definitely the boy needs energy to read the book. So our

05:12answer is option C. Kids, do you know what is the principal source of energy? Principal source of

05:23energy is the Sun. That is all different sources of energy that we learned. Derives energy directly

05:35or indirectly from the Sun. So the Sun is a principal source of energy for all sources of

05:46energy and we will learn how it is in our next grades. So kids, today we learned a lot about energy.