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Q 1.
An iron ball at 40°C is dropped in a mug containing water at 40°C. The heat will?
Ans.
Not flow from iron ball to water or from water to iron ball.
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Q 2.
How sea breeze blows?
Ans.
During day.
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Q 3.
How land breeze blows?
Ans.
During night.
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Q 4.
Which colour clothes absorb more heat?
Ans.
Dark colour.
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Q 5.
Temperature is measured by?
Ans.
Celsius.
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Q 6.
Define Conductors?
Ans.
Materials which allow heat to pass through them easily.
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Q 7.
Define Conduction?
Ans.
By which heat is transferred from hotter end to colder end.
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Q 8.
Heats flows from?
Ans.
Hotter object to colder object.
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Q 9.
The thermometer that measures our body temperature is called?
Ans.
Clinical thermometer.
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Q 10.
Temperature is measured by?
Ans.
Thermometer.
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Q 11.
Range of a laboratory thermometer?
Ans.
10°C to 110°C.
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Q 12.
Number of ways heat is transferred by?
Ans.
1.Radiation
2.Conduction 3.Convection |
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Q 13.
What is the range of clinical thermometer?
Ans.
35°C--42°C.
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Q 14.
What is the normal temperature of human body
Ans.
37°C.
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Q 15.
Stainless steel pans are usually provided with copper bottom. The reason for this because?
Ans.
Copper is a better conductor of heat than the stainless steel.
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Q 16.
A wooden spoon is dipped in a cup of icecream. There is any change in the other end of wooden spoon?
Ans.
Doesn't become cold.
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Q 17.
If you have one litre of water at 50°c mixed with one litre of water at 30°c. What will be the temperature of the mixture?
Ans.
Between 30°c to 50°c.
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Q 18.
A steel spoon is dipped in a cup of a hot coffee. Heat is transferred to its other end by which process?
Ans.
Conduction.
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Q 19.
In which process transfer of heat requires no medium?
Ans.
Radiation.
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Q 20.
Temperature of Boiling water can be measured through?
Ans.
Laboratory thermometer.
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