NCERT Solutions for Class 5 EVS Chapter 15 - Blow Hot, Blow Cold
NCERT Solutions for Class 5 EVS Chapter 15 Blow Hot, Blow Cold is available in the PDF format on Vedantu. It is provided to students as a complete study material. NCERT Solutions Class 5 EVS Blow Hot, Blow Cold is an important part of the CBSE EVS syllabus. The explanation is provided by the subject matter experts and experienced teachers who have attempted to cover every aspect of the topic, including additional knowledge. The answers to the questions given at the end of each chapter are provided by NCERT Solutions Class 5 EVS Chapter 15.
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NCERT Solutions for Class 5 EVS Chapter 15 Blow Hot, Blow Cold
The free downloadable Solutions for Class 5th EVS Chapter 15 provides a detailed explanation of the topic Class 5 EVS Chapter 15 Blow Hot, Blow Cold.
Chapter 15 - Blow Hot, Blow Cold
NCERT Solutions for Class 5 EVS Chapter 15
EVS Class 5 Chapter 15 explains the difference between the warmth and cold with different simple day-to-day experiments. The chapter starts with the story of a woodcutter and Mian Balishtiye, where Mian Balishtiye is observing the woodcutter and his activity of blowing air from far away. The woodcutter blows air in three different scenarios during the whole episode, which surprises Mian Balishtiye tremendously.
The woodcutter, while cutting the wood in the chilling atmosphere, would keep down his axe and blow air on his hands to make them warm.
The woodcutter in the second instance kept a handi filled with potatoes on damp wood and blew air on the fire to help it burn properly.
The woodcutter in the third instance picked out the hot potatoes and blew air from his mouth to make it cool.
Mian Balistiye asked woodcutter every time he saw him (woodcutter) doing the same for a different reason. He considered this to be a weird behaviour and thought him to be a ghost or djinn. He was unaware that the air coming out of the mouth makes it hot or cold according to the temperature and distance.
When you put your hands at some distance from your mouth and blow, is the air warmer or colder? Explain.
When air is blown on the hands from our mouth from some distance, the air seems to be colder. This is because the warm air from the mouth mixes with the surrounding cold air.
Ch 15 Class 5 EVS revolves around the concept of air and covers important topics explained in brief below:
Warm and cold air is blown out of the mouth.
Air is blown in different ways. For example, when whistles are made from the wrapper of toffee, a leaf, a balloon, the cap of a pen, etc. The order from loudest to softest whistles goes as- the cap of a pen, any other thing such as whistling through the mouth, by the wrapper of toffee, a balloon and a leaf.
Different musical instruments can be recognized, easily just by hearing their sounds. This is because the sound is affected by the vibrations the instrument produces. Some instruments are used by blowing air into it such as the flute, the mouth organ, etc.
The air blown out of the mouth makes the mirror or glass look hazy. The reason being the warm air coming out of the mouth and the cold mirror converts the water vapour from the mouth into little drops of water on the mirror or glass. These make the glass or mirror look hazy. The same logic is applied in cleaning spectacles.
Class 5 EVS Ch 15 NCERT Solutions explain the effect of breathing in and out. The measurement of the chest is more when breathed in while it decreases when breathed out.
The Difference in the rate of Breathing before and after Jumping
The rate of breathing per minute increases after jumping because our body needs more air. At the same time, the rate of breathing per minute is less before jumping because our body is resting. This is very well explained in Class 5 EVS Ch 15 NCERT Solutions.
The Clock inside you
Doctors use a stethoscope to check the chest by placing it on the chest. What do they do? They listen to the heartbeat, which sounds similar to a clock ticking. The heart functions to pumps blood to different parts of the body. Class 5th EVS Chapter 15 has mentioned an experiment with a funnel which students can try to listen to the heartbeats. The PDF has almost 18 questions from the textbook that are solved with accuracy.
Key features of NCERT Solution for Class 5 EVS Chapter 15
CBSE Class 5 EVS Chapter 15 Solutions has everything mentioned in it and has solved more than 22 questions given at the end of each topic which serves as self-explanation for students. Class 5 Chapter 15 Solutions are well-written and accurate and hence make the reader confident and independent in his studies without having to depend on additional tutors to cover up the gaps in the understanding. The freely downloadable material is accessed from anywhere, anytime.
FAQs (Frequently Asked Questions)
Q1. Can we find out from the movement of the snake made from the paper if the air is moving upwards or downwards?
Ans: Yes, we can tell from the snake's movement if the air is moving upwards or downwards. When air is moving upwards, the paper moves in a clockwise direction and when the air is moving downwards, the paper moves in an anticlockwise direction. When this paper snake is held under a fan, the air is coming from the above, which makes it move in an anticlockwise direction. To observe air movement, you can take the snake in different places and directions.
Q2. We blow to cool things as well to warm them. Give examples of each.
Ans: The examples of blowing air to cool them or warm them are given below:
We blow onto hot tea and hot soup to make it cold.
We blow onto our hands in winter to reduce their numbness due to cold.
We blow on a handkerchief and dab it against an injured eye to provide relief from pain.
Q3. Who is the main character of the story in the chapter “Blow Cold” for Class 5 students in EVS? Why does he keep blowing on his hands?
Ans: The main character in the story 'Blow Cold' is a woodcutter. He was working on the day's chores. On various occasions, he would blow air from his mouth. In this instance, he kept blowing on his hands to keep himself warm. It was a very cold winter day, and his fingers had become numb. So now and then, the woodcutter would put down his axe and blow on his hands.
Q4. What are the instances when the woodcutter blows air from his mouth?
Ans: Chapter 15 of Class 5 EVS is an interesting one that shows the blowing of air from the woodcutter's mouth. These different situations show differences in warmth and cold in a human being's daily life. The following are instances of the woodcutter blowing air through his mouth:
Blowing on his hands while working
Blowing on the fire while making lunch
Blowing on the potato while eating.
Q5. Who is Mian Balishtiye in Chapter 15 of Class 5 EVS?
Ans: One fine winter day, while a woodcutter was cutting wood to sell it in the city by evening, a person named Mian Balishtiye was watching him from a corner. This person grew bewildered at the woodcutter's different antiques as he blew air through his mouth. He was an inquisitive person who could not understand why the woodcutter used the air from his mouth differently for different occasions.
Q6. Briefly describe the story of the woodcutter given in Chapter 15 of Class 5 EVS?
Ans: The woodcutter was a good man who earned his living by selling wood in the city. The story teaches students about the different instances of warmth and cold and how these instances change the perception of air that comes out from the mouth. In this story, Mian Balishtiye is scared of knowing that the same air from the mouth can be used for different purposes.
Q7. How do NCERT Solutions help in learning Chapter 15 of EVS for Class 5 students?
Ans: NCERT Solutions of 'Blow Cold' are provided by Vedantu as complete study material for students. Experienced professionals who know every aspect of the topic have created these answers in clear language such that Class 5 students can easily follow them. Additional knowledge on the topics is provided with these solutions for easy understanding and clarity. Thus, all the important concepts regarding the blowing of air are covered briefly and clearly. The solutions provided by Vedantu are free of cost. They are also available on the Vedantu Mobile app.