Last updated on December 9th, 2023 at 09:09 pm
Class 7 Science Chapter 4 Heat MCQ
The transfer of heat from one place to another without the help of any medium is called:
a) Conduction
b) Radiation
c) Convection
d) None of the above
Answer: Radiation
The unit of measurement of temperature is:
a) Kelvin
b) Joule
c) Watt
d) None of the above
Answer: Kelvin
The process of transfer of heat through solids is called:
a) Convection
b) Radiation
c) Conduction
d) None of the above
Answer: Conduction
The material that is a poor conductor of heat is called:
a) Insulator
b) Conductor
c) Metal
d) None of the above
Answer: Insulator
The process of transfer of heat through fluids is called:
a) Convection
b) Radiation
c) Conduction
d) None of the above
Answer: Convection
The metal that is the best conductor of heat is:
a) Copper
b) Silver
c) Gold
d) None of the above
Answer: Silver
The process of transfer of heat through electromagnetic waves is called:
a) Conduction
b) Radiation
c) Convection
d) None of the above
Answer: Radiation
The instrument used to measure temperature is called:
a) Thermometer
b) Barometer
c) Hygrometer
d) None of the above
Answer: Thermometer
The material that is a good conductor of heat is called:
a) Insulator
b) Conductor
c) Metal
d) None of the above
Answer: Conductor
The process of transfer of heat through gases is called:
a) Convection
b) Radiation
c) Conduction
d) None of the above
Answer: Convection
Which device is used to measure temperature?
a) Thermometer
b) Clinical thermometer
c) Laboratory thermometer
d) All of the above
Answer: d) All of the above
What is the range of a clinical thermometer?
a) -10°C to 110°C
b) 35°C to 42°C
c) -10°C to 35°C
d) 42°C to 110°C
Answer: b) 35°C to 42°C
What is the range of laboratory thermometers?
a) -10°C to 110°C
b) 35°C to 42°C
c) -10°C to 35°C
d) 42°C to 110°C
Answer: a) -10°C to 110°C
What is the normal temperature of the human body?
a) 35°C
b) 42°C
c) 37°C
d) 110°C
Answer: c) 37°C
How does heat flow from one object to another?
a) Conduction
b) Convection
c) Radiation
d) All of the above
Answer: d) All of the above
Which method of heat transfer is primarily observed in solids?
a) Conduction
b) Convection
c) Radiation
d) All of the above
Answer: a) Conduction
In which states of matter is heat primarily transferred by convection?
a) Solids
b) Liquids
c) Gases
d) Both b) and c)
Answer: d) Both b) and c) – Liquids and gases
Which method of heat transfer does not require a medium?
a) Conduction
b) Convection
c) Radiation
d) Both a) and b)
Answer: c) Radiation
Materials that allow heat to pass through them easily are called:
a) Insulators of heat
b) Conductors of heat
c) Reflectors of heat
d) Absorbers of heat
Answer: b) Conductors of heat
What are materials called that do not allow heat to pass through them easily?
a) Conductors
b) Insulators
c) Radiators
d) Reflectors
Answer: b) Insulators
Which type of objects absorb more heat: dark-colored or light-colored?
a) Dark-colored objects
b) Light-colored objects
c) Both absorb the same amount of heat
d) It depends on the material, not the color
Answer: a) Dark-colored objects
Why do we feel more comfortable wearing light-colored clothes in the summer?
a) Light-colored clothes reflect heat
b) Light-colored clothes absorb more heat
c) Light-colored clothes are more breathable
d) Light-colored clothes have better insulation properties
Answer: a) Light-colored clothes reflect heat
Why do woollen clothes keep us warm during winter?
a) Wool absorbs heat from the environment
b) Wool reflects heat away from the body
c) Wool is a good conductor of heat
d) Wool is a poor conductor of heat and traps air between its fibers
Answer: d) Wool is a poor conductor of heat and traps air between its fibers
