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Heat Transfer in Nature Science - Heat Transfer in Nature

Gujarat Board (GSEB) - STD 7 - Science (GSEB - English Medium). 208 questions in this chapter.

Question types

Heat Transfer in Nature question types

208 questions across 9 question groups — pick any mix to generate a Science paper with step-by-step answer keys.

208
Questions
9
Question groups
5
Question types
Sample Questions

Heat Transfer in Nature questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1MCQ (1 Marks)1 Mark
A smoke detector is a device that detects smoke and sounds an alarm. Suppose you are fitting a smoke detector in your room. The most suitable place for this device will be :
  • A
    Near the floor
  • B
    In the middle of a wall
  • ✓
    On the ceiling
  • D
    Anywhere in the room

Answer: C.

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Q 2MCQ (1 Marks)1 Mark
Pins are stuck to a metal strip with wax and a burning candle is kept below the rod, as shown in Fig. Which of the following will happen?
Image
  • A
    All the pins will fall almost at the same time.
  • B
    Pins I and II will fall earlier than pins III and IV
  • C
    Pins I and II will fall later than pins III and IV
  • ✓
    Pins II and III will fall almost at the same time

Answer: D.

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Q 3MCQ (1 Marks)1 Mark
Choose the correct option in each case.
(i) Your father bought a saucepan made of two different materials, A and B, as shown in Fig. The materials A and B have the following properties
Image
  • A
    Both A and B are good conductors of heat
  • B
    Both A and B are poor conductors of heat
  • ✓
    A is a good conductor and B is a poor conductor of heat
  • D
    A is a poor conductor and B is a good conductor of heat

Answer: C.

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Q 6Assertion (A) & Reason (B) MCQ1 Mark
Assertion (A): Conduction is the transfer of heat through a material without the movement of its particles itself.
Reason (R): In conduction, heat moves from the colder part to the hotter part of the material.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • ✓
    A is true but R is false.
  • D
    A is false but R is true.

Answer: C.

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Q 7Assertion (A) & Reason (B) MCQ1 Mark
Assertion (A): Seepage of water into the ground is an important part of the water cycle.
Reason (R): Water that seeps into the ground becomes part of the groundwater.
  • ✓
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • D
    A is false but R is true.

Answer: A.

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Q 8Assertion (A) & Reason (B) MCQ1 Mark
Assertion (A): Sea breeze refers to the movement of cold air from sea towards land during day time.
Reason (R): Land breeze refers to the movement of cold air from land towards sea during night time.
  • A
    Both A and R are true and R is the correct explanation of A.
  • ✓
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • D
    A is false but R is true.

Answer: B.

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Q 9Assertion (A) & Reason (B) MCQ1 Mark
Assertion (A): Evaporation is a process where water changes into vapour and rises into the atmosphere.
Reason (R): Evaporation requires heat energy from the Sun or other sources.
  • ✓
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • C
    A is true but R is false.
  • D
    A is false but R is true.

Answer: A.

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Q 10Assertion (A) & Reason (B) MCQ1 Mark
Assertion (A): Radiation is a method of transfer of heat.
Reason (R): The process of heat transfer that does not require any medium is called convection.
  • A
    Both A and R are true and R is the correct explanation of A.
  • B
    Both A and R are true but R is not the correct explanation of A.
  • ✓
    A is true but R is false.
  • D
    A is false but R is true.

Answer: C.

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Q 211 Marks Question1 Mark
A burning incense stick is fixed, pointing downwards. In which direction would the smoke from the incense stick move? Show the movement of smoke with a diagram.
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Q 282 Marks Questions2 Marks
A shopkeeper serves you cold lassi in a tumbler. By chance, the tumbler had a small leak. You were given another tumbler by the shopkeeper to put the leaky tumbler in it. Will this arrangement help to keep the lassi cold for a longer time? Explain.
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Q 323 Marks Question3 Marks
Two test tubes with water are heated by a candle flame as shown in Fig. Which thermometers (Fig. a or Fig. b) will record a higher temperature? Explain.
Image
Fig. Two thermometers dipped in two test tubes
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Q 36Match the Following.4 Marks
Column AColumn B
Q.1. Land breeze blows during(a) summer
Q.2. Sea breeze blows during(b) winter
Q.3. Dark coloured clothes are preferred during(c) day
Q.4. Light coloured clothes are preferred during(d) night
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Q 37Match the Following.4 Marks
Column AColumn B
Q.1. Conduction(a) No medium needed
Q.2. Convection(b) Cool air moves from sea to land
Q.3. Radiation(c) Poor conductors of heat
Q.4. Sea breeze(d) Movement of particles in gases or liquids
 (e) Requires medium in solids
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