**Jugs and Mugs**

*Questions with (*) sign are open-ended questions.*

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The elephant is drinking 50 litres of kheer.

The giraffe is drinking __30__ litres.

The cow is drinking __15__ litres.

Then came the squirrel. She said I can’t drink 1 litre of kheer. Please give me only 500 millilitres kheer.

The donkey asked- 500 millilitres of kheer? Isn’t that more than a litre?

No, 500 millilitres are less than a litre.

The fox said- come on, don’t behave like a donkey! One litre is 1000 millilitres, so 500 millilitres is half a litre.

The fox got another chance to show off! He said that is simple 10 times hundred millilitres is __1000__ millilitre = 1litre.

Now you write it 10 X 100 ml = __1000__ ml

= 1 litre.

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Each ant drinks 1 millilitre of kheer.

So, 1000 ants drink: 1000 X 1 ml = __1000__ ml.

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Do you like kheer? What do you call it at home?

Yes, I like kheer. We call it kheer.

How much kheer can you have?

I can have 100 – 200 ml of kheer.

Can you drink 1 litre of water at one time?

No.

The donkey is trying to look for different ways to add up to 1 litre. Help him complete the chart.

Answer:

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Look Around

Look at these pictures. Now look for some other things we get in packets or bottles like these. Make your own list.

Have you seen a one-litre bottle?

Yes.

Collect a –litre bottle and some other small bottles. Guess how many times you have to pour from each of the small bottles to fill the litre bottle.

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Check if your guess is correct and fill the table.

Bottle | My guess | My measure |

Bottle 1 | 4 | 4 |

Bottle 2 | 2 | 2 |

Bottle 3 | 4 | 4 |

Bottle 4 | 5 | 5 |

Bottle 5 | 1 | 1 |

How much water does his small bottle hold?

His small bottle can hold 500 mL.

Then how much water does Leela’s bottle hold? __200 mL. __

Ramu got an empty 250 mL coconut oil bottle. Look at the picture and discuss what he did to make his big measuring bottle.

(i) At the beginning he filled his 250 mL coconut oil bottle with water.

(ii) Then he poured the water in the big bottle and the marked level of the water as 250 mL.

(iii) He again poured the water into the big bottle and the marked level of the water as 500 mL.

(iv) He poured the water in the big bottle and the marked level of the water as 750 mL.

(v) In the same way he poured the water in the big bottle and the marked level of the water as 1000 mL.

In this way, he made his big measuring bottle.

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Find your own way to make a bottle which can measure 200 mL, 400 mL, 600 mL, 800 mL and 1 litre. Discuss with your friends and teacher how you made this.

(i) At the beginning take a 200 mL bottle with water.

(ii) Then pour the water into the big bottle and mark the level of the water as 200 mL.

(iii) Then again pour the water in the big bottle and the marked level of the water as 400 mL.

(iv) Then pour the water in the big bottle and the marked level of the water as 600 mL.

(v) In the same way repeat to mark the water level at 800 mL and 1000 mL.

In this way, we can make a big measuring bottle that measures 200 mL, 400 mL, 600 mL, 800 mL and 1 litre.

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Neetu has to take 3 injections in a day for 5 days. One injection gives 5 mL of the medicine to your body. How much medicine will she need for one day?

One injuction = 5 ml

Number of injections per day = 3

Medicine needed by Neetu for one day = 5 ml X 3

= 15 mL.

How much medicine in all for 5 days?

Medicine need for one day = 15 mL

Medicine need for 5 days = 15 ml X 5

= 75 mL.

How much do we use at a time?

Eye drops. __We use less than 1 mL at a time__.

Cough syrup __We use 5 mL at a time__

Tea __We use about 30-40 mL at a time__

Cold Drinks __We use about 50 mL at a time__

List things we use more than one litre at a time.

(i) water for taking a bath

(ii) for washing clothes

(iii) for washing utensils

(iv) for washing vehicles

(v) filling petrol or diesel in vehicles.

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Practice Time

1). Amina’s water bottle holds one litre of water. She drank 250 ml of water and her friend Govind drank 150 ml. How much water is left in her bottle?

Water in the Amina’s bottle = 1 litre = 1000 mL

She drank 250 mL of water

Water in the bottle = 1000 mL – 250 mL

= 750 mL

Govind drank 150 mL

Now water left in the bottle = 750 mL – 150 mL

= 600 mL

2). Yusuf runs a tea shop. For making a glass of tea he uses 20 ml of milk. Yesterday he made 100 glasses of tea. How much milk did he use?

Milk required for 1 glass of tea = 20 mL

Milk required for 100 glasses of tea = 20 X 100

= 2000 mL

= 2 L

3). Radha’s grandma was ill. The doctor gave her a bottle with 200 ml of medicine. She has to take the medicine every morning for 10 days. How many milliliters of medicine does she have to take every morning?

Medicine in the bottle = 200 mL

Number of days = 10

Medicine to take everyday = 200 ÷ 10

= 20 mL

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(*) Total water used by them________

Drops and Drops Make an Ocean

(*) Is there any tap in your school or your home which is leaking?

(*) How much water do you think we waste through a leaking tap?

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(*) Find out how much water is wasted in a day.

(*) In a week?

(*) In a month?

(*) In a year?

Chelannur village has a milk society. Geetha and Ammini went there to buy 4 litres of milk. But the man could not find the one litre measure. He had only a 3 litre and a 5 litre bottle with him. But he gave them exactly 4 litres of milk.

Explain how he did this.

(i) first the man in the milk society took out 5 litres of milk.

(ii) he poured the milk in the l3 litre container and the remaining milk he poured into the container with Ammini and Geetha.

(iii) 5-3 = 2 litres milk was in the container of Ammini and Geetha.

(iv) Same step he repeated again and poured 2 litres of milk in the container.

(v) in this way, he gave them 4 litres of milk.

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Chapter 5: The Way The World Looks

Chapter 1: Building With Blocks