CBSE Class 7 Science Heat Worksheet Set D

Download printable Science Class 7 Worksheets in pdf format, CBSE Class 7 Science Heat Worksheet Set D has been prepared as per the latest syllabus and exam pattern issued by CBSE, NCERT and KVS. Also download free pdf Science Class 7 Assignments and practice them daily to get better marks in tests and exams for Grade 7. Free chapter wise worksheets with answers have been designed by Standard 7 teachers as per latest examination pattern

TOPIC: Heat

 

 

Q1.When one litre of water at 300C is mixed with one litre at 48C, what will be the temperature of the mixture obtained?
 
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Q2. Why conduction is not possible in solids?
 
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Q.3.Heat from the sun heats up the earth, but air in the atmosphere does not get heated up. Why?
 
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Q4. Water is a bad conductor of heat, but we heat water without any difficulty. How is it possible?
 
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Q.4.Discuss why wearing more layers of clothing during winter keeps us warmer than wearing just one thick piece of clothing?
 
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Q.5. Give reasons.
 
a) Ventilators are provided near the ceiling of a room.
 
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b) Ice wrapped in sawdust does not melt.
 
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c) Evaporation of sweat causes cooling.
 
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d) Top of a roof made of asbestos is painted white.
 
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Q.6. Why is it advised not to hold the thermometer by its bulb while reading it?
 
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Q.7.A cold spoon is dipped into a cup of hot coffee. Will it transfer heat to its other end? If yes then by which process?
 
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Q.8. A few sharp jerks are given to the clinical thermometer before using it. Why is it done?
 
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Q9. While sitting around burning wood, by which mode of heat transmission does you receive heat energy? Why do other modes of heat transmission not play a significant role?
 
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Q10. Why is the handle of pressure cooker covered with thick plastic?
 
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