Heat Transfer in Nature

VSAQ for Chapter 7 Heat Transfer in Nature Class 7 Science NCERT

Important Questions

1

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

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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