VSAQ for Chapter 7 Heat Transfer in Nature Class 7 Science NCERT
Important Questions1
Q1: Define temperature.
Answer
The measure of hotness or coldness of an object is called temperature. It is usually measured in "degrees".
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2
Q2: Name the device used to measure temperature.
Answer
A thermometer is a device used to measure temperature.
Thermometer
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3
Q3: What is the unit of temperature as adopted by India?
Answer
Degree Celsius (°C)
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4
Q4: The bulb of the laboratory thermometer should not touch the surface of the _________.
Answer
Container.
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5
Q5: Give an example to show the transfer of heat from one body to another.
Answer
Any utensil kept on flame becomes hot because heat transfers from flame to the utensil.
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6
Q6: Heat always flows from a hotter object to _________.
Answer
Colder object
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7
Q7: In solid heat is transferred by the process of
a. Conduction
b. Convection
c. Radiation
d. None of these
a. Conduction
b. Convection
c. Radiation
d. None of these
Answer
Conduction.
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8
Q8: Give examples of conductors.
Answer
Aluminium, copper, iron, etc.
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9
Q9: Give examples of insulators.
Answer
Wood, plastic, rubber
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10
Q10: Insulators are ________ conductors of heat.
Answer
Poor
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11
Q11: Conductors are _____________ conductors of heat.
Answer
Good
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12
Q12: Name the process by which heat transfers in air.
Answer
Convection.
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13
Q13: From the sun, the heat comes to us by the process called _______________.
Answer
Radiation.
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14
Q14: Which of the two absorbs more radiation- a dark-coloured object or a light-coloured object?
Answer
A dark-coloured object.
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15
Q15: Land breeze blows at the time of __________.
Answer
Night
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16
Q16: Sea breeze blows at the time of _________.
Answer
Day
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17
Q17: Which type of clothing should be preferred for the month of June?
Answer
Light-coloured clothes
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18
Q18: Which type of clothing should be preferred in January?
Answer
Dark coloured clothes.This should now be in the correct order without any missing questions! Let me know if you'd like further changes.
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