The chapter “Experiments with Water” is taken from Let’s Look Around and Learn Environmental Studies for students of Class IV of JKBOSE. You have already read Question Answers of Experiments with Water in my previous post. This post is about Experiments with Water Class 5 Chapter Notes. Let’s get started with the post:
Experiments with Water Class 5 Chapter Notes
The chapter Experiments with Water is about different types of experiments that we do with water. Some things float in water while some sink, some things dissolve in water while others do not also water evaporates on boiling.
What Floats – What Sinks
Ayesha watched her mother preparing dinner for her. She was making puri and spicy potatoes. She saw that when her mother put a rolled-out puri in hot oil, it first sank in the oil. When it puffed up, the puri came up and started floating on the oil.
- If the weight of an object is less than the water displaced by it, the object will float on it.
- If the weight of an object is more than the water displaced by it, the object will sink into it.
Is it Magic?
The Eggs came up a little and started floating when Ayesha put too much salt in the water because the water gets denser and the weight of the liquid displaced by the eggs was more than the eggs themselves, that’s why the eggs came up a little and start floating.
It is the saltiest water body on earth. The water of the Dead Sea has about 300 grams of salt in one litre of its water. It is very bitter in taste. Even if the person does not know to swim, he/she does not drown in the sea but will float in it. It is because the water is denser so the weight of water displaced by, he/she became more than he/she. So, he/she will float on the surface of the sea.
What Dissolved, what did not?
There are several things that disappear in water when we add them to water. They are called soluble substances. For example, salt, sugar, glucose, vinegar and lemon juice etc.
There are several other things that do not disappear in water but settle down when we add them to water. They are called insoluble substances. For example, salt, sand, pebbles, chalk powder and cement etc.
How to Dissolve things quicker in Water?
- By continuously stirring the solution while adding soluble substances to it.
- By heating the mixture.
Oil and Water
Oil does not mix with water because it is an immiscible liquid and forms a layer on the surface of the water.
When we put two drops each of water, oil and sugar solutions on the lid of the tiffin box and tilt it. We find that the drops of water will slide faster than the drops of oil and sugar solutions because the drops of both oil and sugar solutions are stuck on the lid of the tiffin box and making it difficult to slide.
Where did the Water Go?
When Ayesha’s mother put some water to boil on the stove for making tea. After boiling the water it converts into water vapours and disappears in the air.
The incident of Dandi March took place in 1930. It was for the making salt because for many years the British had made a law that did not allow Indians to make salt for themselves. They have to pay a heavy tax for salt. Gandhiji and several other people went on a yatra (a long walk) from Ahmedabad to Dandi village on the seashore in Gujarat to protest against this law.
The salt is made from seawater. The seawater is collected in shallow beds dug in the sand. Water is allowed to dry in the sun. After the water dries up, the salt remains on the ground.
That’s all we have about Experiments with Water Class 5 Chapter Notes. Hope you got your answers. Do share your views about this post in the comment section.