Page 1 :
Chapter- 1 5, Blow Hot, Blow Cold, , A.State True or False:, - 1.Seeing the tiny person, the woodcutter was amazed, and amused. True, , - 2.Woodcutter was blowing his hands to freeze them., False, , - 3.Woodcutter blew on the fire to help it burn. True, - 4.Woodcutter blew- foo foo to burn potatoes. False, - 5.A doctor uses a stethoscope to listen to your chest., True, B.Fill in the blanks:, 1.Our heart beats faster after we run., 2.When we blow air out, our chest comes in.

Page 2 :
3.Cold air is heavy_and comes down., , 4.Taking and releasing air in through nose is called, Breathing

Page 3 :
C.Match the column:, Column A, 1.Breathing, rate, increases with, , 2.Flute and Been, are, 3.Popcorn seller, fans the burning, coal, 4.Our breath is, 5.We breath in, , Column B, air, , cooler than hot tea., musical instruments in, which we blow to, produce sound, , Physical activity, to increase air, , supply, Ans, Column A, Breathing rate, increases with, Flute and Been are, , Column B, physical activity, musical instruments, in which we blow to, produce sound

Page 4 :
Popcorn seller fans, the burning coal, Our breath is, We breath in, , to increase air supply, cooler than hot tea., air

Page 5 :
D.Answer these questions:, Q1.How do you cool some food, when it is too hot?, Ans. When a food is too hot, we cool it in following ways:, a- Blowing air with mouth., , b-, , Pouring it in broader vessel, , c-, , Leaving it under the fan for sometime., , Q2.If you were to cool these three hot things- dal, roti, riceIn which ways would you do so?, Ans- We will cool dal, roti and rice in following ways:, a.Dal- Pouring in broader plate or bowl., b- Roti- Blowing the bytes with mouth., c- Rice- Spreading in plate., , Q3.Mini tried to cool her tea by blowing on it. Which do, you think will be hotter- Mini's tea or the air she blew, from her mouth.

Page 6 :
Ans- Tea will be hotter than the air she blew from her, mouth.

Page 7 :
Q4.Sonu was feeling very cold. He kept blowing on to his, hands. Now think and write, which will be cooler Sonu's, hands or his breadth?, , Ans- Sonu’s hands were cooler than his breadth., Q5.You must have seen someone blowing on their spectacles, to wipe them clean. How does the air from mouth help in, cleaning the spectacles?, Ans- Some people blow on their spectacles to wipe them, clean. Air we blow from mouth is wet and helps in cleaning, the glass., Q6.Why does a mirror become hazy on blowing air from, mouth?

Page 8 :
⁷, , Ans- Air from our mouth is wet and tiny water, droplets in it make the mirror hazy on blowing air, from mouth.