Class vii science chapter 4 mcq
subham tutorial
science chapter 4
HEAT
Questions:-
1. An example of the conductors of heat isA) Aluminium
B) Wood
C) Plastic
2. An example of the conductors of heat is
A) Plastic
B) Iron
C) Wood
3. An example of insulators of heat is
A) Wood
B) Aluminium
C) Iron
4. An example of insulators of heat is
A) Aluminium
B) Plastic
C) Iron
5. The hotness of an object is determined by its __ __.
A) Pressure
B) Temperature
C) Neither a or b
D) Both a and b
6. Temperature of boiling water cannot be measured by a __ __ thermometer.
A) Celcius
B) Clinical
7. Temperature is measured in degree ___ _.
A) Celcius
B) Clinical
8. No medium is required for transfer of heat by the process of ___ _.
A) Conduction
B) Convection
C) Radiation
9. A cold steel spoon is dipped in a cup of hot milk. It transfers heat to its other end by the
process of __ _ _.
A) Radiation
B) Convection
C) Conduction
10. Clothes of ___ _ colours absorb heat better than clothes of light colours.
A) Dark
B) Light
C) Orange
D) Brown
11. Land breeze blows during
A) day
B) night
C) summer
D) winter
12. Sea breeze blows during
A) winter
B) night
C) day
D) summer
13. Dark coloured clothes are preferred during
A) night
B) winter
C) day
D) summer
14. Light coloured clothes are preferred during
A) night
B) summer
C) winter
D) day
15. Transfer of heat from burner to pan is by
A) conduction
B) radiation
C) convection
16. Transfer of heat from pan to water is by
A) radiation
B) conduction
C) convection
17. Transfer of heat within water is by
A) conduction
B) radiation
C) convection
18. One litre of water at 30°C is mixed with one litre of water at 50°C. The temperature of the
mixture will be
A) 20°C
B) between 30°C and 50°C
C) 80°C
D) more than 50°C but less than 80°C
19. An iron ball at 40°C is dropped in a mug containing water at 40°C. The heat will
A) not flow from iron ball to water or from water to iron ball.
B) flow from iron ball to wate
C) increase the temperature of both.
D) flow from water to iron ball.
20. A wooden spoon is dipped in a cup of ice cream. Its other end
A) becomes cold by the process of convection.
B) becomes cold by the process of radiation.
C) does not become cold.
D) becomes cold by the process of conduction.
21. Stainless steel pans are usually provided with copper bottoms. The reason for this could be
that
A) copper is a better conductor of heat than the stainless steel.
B) such pans appear colourful.
C) copper bottom makes the pan more durable.
D) copper is easier to clean than the stainless steel.
22. Quiz on Comparing Quantities for CBSE/Class VII Narayana Home School, Nanniode - an
online concept school nhsnanniode@gmail.com Type Yes to continue...
A) No
B) Yes
answer key:-
1.A 2.B 3.A 4.B 5.B 6.B 7.A 8.C 9.C 10.A 11.B 12.C 13.B 14.B 15.B 16.B 17.C 18.B
19.A 20.C 21.A 22.B
1: Define heat.
View Answer
Ans:Heat is a form of energy, entry or exit of which correspondingly increases or decreases internal energy of a body when no work is done on the body or by the body. It is measured in joule or calories.
Q2: Define temperature. What is its unit?
View Answer
Ans:A reliable measure of the hotness of an object is its temperature. Temperature is measured by a device called thermometer. Unit of temperature is degree Celsius (°C), Fahrenheit and Kelvin (SI unit).
Q3: What is the use of the maximum – minimum thermometer?
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