CLASS 7 HEAT AND TEMPERATURE
1.Why is there gap in the rail tracks between two joints?
2.How is rate of expansion different in solids, liquids and gases? give reason.
3.Why mercury is commonly used in thermometers?
4.Convert the following temperature to degree celsius (i) 86 degree Faherenheit
Why does the mercury not fall or rise in a clinical thermometer when taken out of the mouth?
6. How does the heat from the sun reach us?
7.Why stainless steel cooking utensils are usually provided with copper bottoms?
8. fill in the blanks
1.Measure of degree of hotness or coldness of a body _____________
2 Lower fixed point of Celsius scale ________
3 SI unit of temperature____________
4 Upper fixed point of a Faherenheit scale _____________.
1.Why is there gap in the rail tracks between two joints?
2.How is rate of expansion different in solids, liquids and gases? give reason.
3.Why mercury is commonly used in thermometers?
4.Convert the following temperature to degree celsius (i) 86 degree Faherenheit
Why does the mercury not fall or rise in a clinical thermometer when taken out of the mouth?
6. How does the heat from the sun reach us?
7.Why stainless steel cooking utensils are usually provided with copper bottoms?
8. fill in the blanks
1.Measure of degree of hotness or coldness of a body _____________
2 Lower fixed point of Celsius scale ________
3 SI unit of temperature____________
4 Upper fixed point of a Faherenheit scale _____________.
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