Experiments with Water Class 5 Question Answers

“Experiments with water” is Chapter 4 in Class IV EVS for JKBOSE students. In this post, I am discussing Experiments with Water Class 5 Question Answers with you. You have already read Question Answers of Seeds and Seeds in the last post. Let’s get started with this post:

Experiments with Water Class 5 Question Answers

Introduction

The chapter “Experiments with Water” is about how different objects behave with different objects. It introduces children to which things float on water and which sink in water, which things dissolve in water and which do not. 

Experiments with Water Question Answers

Think what would happen if Page No 36

1. Ayesha put a puffed puri in a bowl of water. Would it sink or float?

Ans. The puffed puri will float on the surface of the water in the bowl of water.

2. You put a steel plate on water. Would it sink or float? What would happen to a spoon?

Ans. If a steel plate is put carefully on the surface of the water it will float. The spoon will sink into the water.

3. Would the cap of a plastic bottle sink or float on water?

Ans. The cap of the plastic bottle float on the surface of the water.

Do this and find out Page No. 37

• Do this experiment in groups of four friends. Each group will need a big pot filled with water and the things listed on the table. Put each thing one by one in water and observe. Write your observations in the table given below:

• Find out from the other groups which things floated and which sank in the water?

Ans. The heavy things like a metal chain, hammer, steel key chain etc. usually sink in water while the lighter things like plastic balls, foam balls etc. float on the surface of the water.

• After doing the experiment, fill in the blanks.

1. The iron nail ______ in water but the katori ______. I think this happened because __________________
2. The empty plastic bottle ______ on water. The bottle filled with water ______ because _________________
3. The aluminium foil ______ when it was spread out. When pressed tightly into a ball it __________. This may have happened because __________________

Ans.

1. The iron nail sank in the water but the katori floated. I think this happened because the weight of water displaced by the iron was less than it but the weight of water displaced by the katori was more than it.
2. The empty plastic bottle floated on the water. The bottle filled with water sank because the weight of water displaced by the empty plastic bottle was more than its weight but the weight of the bottle filled with water was more than that of the weight of water displaced by it.
3. The aluminium foil floated when it was spread out. When pressed tightly into a ball it sank. This may have happened because the weight of aluminium foil is less than that of water displaced by it but the weight of the aluminium ball is more than that of the water displaced by it.

Is it magic?

1. Take some water in a glass. Put a lemon in it. Now keep putting salt in the water, half a spoon at a time. Were you able to float your lemon in water?

Ans. Yes, the lemon will start floating in the water after dissolving a large amount of salt in the water.

2. What do you think, the lemon floated in salty water, because……

Ans. When we keep adding salt to the water the lemon starts to float because the water becomes thicker (i.e. density of water increases).

What dissolved, what did not? Page No 39

Ans. For dissolving sugar quickly, Hamid can follow these methods:

1. Continuously stirring the mixture.
2. By heating the mixture.

Do this experiment Page No. 40

1. Make groups of four friends. For the experiment, you will need 4-5 glasses or bowls, spoons, water, and the things listed on the table. Take some water into each glass. Now try to dissolve one thing in one glass. Observe what happens and note in the table

Ans.

Tell Page No. 40

1. Could you see the salt after it dissolved in water? If not, why?

Ans. Salt cannot be seen after it dissolves in water. This is because the salt is completely soluble in water.

2. Does that mean that the water does not have salt? If it has, then where is the salt?

Ans. No, it does not mean that the water does not have salt in it. The salt is completely dissolved in water.

3. What difference did you see – in the water with salt and the water with chalk powder – after keeping for some time?

Ans. The salt gets completely dissolved in water while chalk powder does not dissolve in water. After some time chalk powder settles down at the bottom of the water.

4. Which of the two would you be able to separate from the water by straining with a cloth – salt or chalk powder?

Ans. We can strain the chalk powder by using cloth because it does not get dissolved in water but salt gets completely dissolved in water so we cannot strain it.

5. Do you think the oil got dissolved in the water? Why do you think so?

Ans. No, the oil doesn’t get dissolved in water. It just floats on the water.

Racing drops Page No. 41

Ayesha put two drops of oil on the lid of her tiffin box. Next to that, she put two drops of water and two drops of sugar solution. She tilted the lid. She saw some drops slide down quickly, while some were left behind.

1. You also try to do the same and then tell – which drop went ahead? Why did it slide faster?

Ans. Drops of water slide faster than the oil drops or sugar solution since both oil and sugar solution gets stuck to the box making it difficult to slide.

Where did the water go?

One day Ayesha’s mother put some water to boil on the stove for making tea. She got busy with something and forgot about it. When she remembered and came to check, she found very little water left in the pan.

1. Think where did the water go?

Ans.  The water gets evaporated and turned into vapour.

3. At your house, what things are made by drying in the sun?

Ans. At my home, they prepare papad, pickles, sabudana, papad, mango jelly, bidis and potato chips by drying them in the sun.

What we have learnt

1. You have washed your handkerchief and you want to dry it quickly. What can you do?

Ans. I will squeeze the water out of the handkerchief and spread the handkerchief on a clothesline, in the sun. I can also use a hot electric iron to dry the handkerchief.

2. What things do you put in water to make tea? Which of those things dissolve in water?

Ans. We have to add sugar, tea powder, and milk to the water to prepare tea. Milk and sugar get dissolved in water while the tea leaves settle down at the bottom.

3. You have been given some mishri pieces (lumps of sugar). Suggest some ways to dissolve them quickly.

Ans. Lumps of sugar can be dissolved by adding a little amount of water and putting it on a low flame, lumps of sugar can be crushed into smaller pieces later by adding water to it could be heated over a flame and continuous stirring results in dissolving.

That’s all we have about Experiments with Water Class 5 Question Answers. Hope it has helped you with your query. Do share your views about this post in the comment section below.