Experiments with Water Class 5 Notes CBSE EVS Chapter 7 (Free PDF Download)

Summary of Experiments with Water

• This chapter helps us to understand the features of water.

• How an object sinks and floats on water.

• This chapter helps us to do some experiments with water and understand the properties of water or a liquid in a better way.

What Floats – What Sinks?

• Ayesha was looking forward to her meal. Her Ammi was making puri and spicy potatoes today, which is one of her favourite dishes.

• Ayesha stood there watching her mother roll out the puri and drop it into the boiling oil.

• She noticed that the puri initially sank to the bottom of the pan.

• The puri rose to the surface and began to float in the oil as it puffed up. One puri did not puff up or float as well as the others.

• Ayesha took some dough and rolled it into a ball after seeing this. She pressed it flat and placed it in a bowl of water. Alas! It sank to the bottom and remained there for a long time.

• This shows things sink in a liquid because of its structure not weight.

• Like a big ship doesn’t sink but a small needle sink because the structure of the ship has a vacuum but the needle’s structure is occupied.

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Is it Magic?

• Salt helps things with higher density float in the water.

• While boiling eggs when we add salt to the water, we can see that the eggs start floating.

• The Dead Sea is a good example.

• Salty water can be found in all oceans and seas. The Dead Sea is the saltiest of all.

• Surprisingly, a person who does not know how to swim would not drown in this sea.

• About 300g of salt is found in 1 liter of water of the dead sea.

What dissolved, what did not?

• Several things dissolve with water quickly, some take time and some never dissolve. 

• Let’s have a look

Racing drops

• Here we can study which liquid travels faster.

• A pure water travels faster.

• Water with impurities or solution will travel slowly.

• Liquids with higher density will travel slowly.

Evaporation and Dandi March

• When a liquid substance turns into a gas, it is called evaporation. Water evaporates when it is heated. 

• Dandi March took place in 1930 before India became independent.

• For many years, the British had enacted legislation prohibiting people from producing their salt.

• Salt was also subjected to a high tax. This law made it illegal for people to make salt at home.

• To protest this law, Gandhiji and a group of others went on a yatra (long walk) from Ahmedabad to the Dandi seashore in Gujarat.

Making of Salt

• The seawater is collected in shallow sand-filled beds. 

• The sun is used to dry the water. 

• The salt remains on the ground after the water has dried.

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Practice Questions

Q1. Why would a person continue to float in the Dead Sea if he has no idea what he is doing?

Ans: The Dead Sea has a lot of salt, which helps you stay afloat.

Q2. On a sunny day, why do clothes dry faster than on a cloudy day?

Ans: In hotter weather, the temperature in the sun is higher than in the shade, and evaporation occurs more quickly. As a result, wet clothes dry quickly in the sun.

Q3. Why did Mahatma Gandhi undertake the Dandi March? 

Ans: The Dandi March is a protest against British injustices and the salt monopoly that was led by Mahatma Gandhi and his volunteers on March 12, 1930, from Sabarmati Ashram. The production of salt was a monopoly practised by the British, who also levied a high tax on it.

Word Meanings

• Sinks: become submerged in something by descending below its surface, especially in a liquid

• Float: Without sinking, one can stand or move close to the liquid's surface.

• Vacuum: a place devoid of all material.

• Density: the degree to which a substance is compact.

• Dissolve: become or make a substance a part of a liquid by incorporation in order to create a solution.

Importance of CBSE Class 5 EVS Chapter 7 Experiments with Water

This chapter introduces students to the different features of water. For instance, there are many things that float in water. Some things submerge and float whereas some entirely drown. This is a natural phenomenon that this chapter will explain using experiments and examples.

You will also understand the reason behind the behaviour of an iron nail in water and an empty bowl. This chapter aims at building a conceptual foundation so that you can learn various scientific principles later in the advanced classes.

Find out the results of the experiments and correlate them to the concepts this chapter aims to teach. Get to know how these things happen naturally and what the reasons behind them are. Learning and determining things that float in water will also help you differentiate between things based on this concept.

Benefits of Vedantu’s Experiments with Water Worksheets and Revision Notes

• The notes have been prepared to simplify this chapter for the students. It will help students to find out the meaning and concepts of certain phenomena of water. They will learn why these things happen and how we can explain them using notes.

• Refer to the notes when you are studying this chapter. Download the PDF version and use it at your convenience to resolve doubts on your own.

• When you are done preparing this chapter, solve the worksheets and refer to the solutions. Find out 10 things that do not dissolve in water and things that float. It will help develop your answering skills and conceptual foundation.

Download Experiments with Water for Class 5 EVS Revision Notes

Get the free PDF versions of these notes and worksheets. Make your study material for this chapter complete. Learn the fascinating new concepts using these notes and become better at answering questions. Recall what you have studied using these notes before an exam and score well.