MCQs-Temperature and its Measurement-Class 6-Science

Multiple Choice Questions-Chapter 7 (Temperature and its Measurement)-Class 6-Subject Science

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Multiple Choice Questions (MCQs)

Which of the following is used to measure temperature?
a) Weighing scale
b) Thermometer
c) Barometer
d) Speedometer
Answer: b) Thermometer
The unit of temperature in the Celsius scale is:
a) °C
b) °F
c) K
d) m
Answer: a) °C
The normal body temperature of a healthy human being is:
a) 32°C
b) 37°C
c) 50°C
d) 98°C
Answer: b) 37°C
Which thermometer is used to measure body temperature?
a) Clinical thermometer
b) Laboratory thermometer
c) Room thermometer
d) Digital clock
Answer: a) Clinical thermometer
The SI unit of temperature is:
a) Degree Celsius
b) Degree Fahrenheit
c) Kelvin
d) Newton
Answer: c) Kelvin
What type of thermometer is commonly used in hospitals?
a) Room thermometer
b) Laboratory thermometer
c) Clinical thermometer
d) Mercury thermometer
Answer: c) Clinical thermometer
The temperature at which water boils is:
a) 50°C
b) 75°C
c) 100°C
d) 150°C
Answer: c) 100°C
The substance that was traditionally used in thermometers but is now replaced due to its toxicity is:
a) Water
b) Alcohol
c) Mercury
d) Oxygen
Answer: c) Mercury
Which scale is not commonly used to measure temperature?
a) Celsius
b) Fahrenheit
c) Kelvin
d) Kilogram
Answer: d) Kilogram
Which thermometer can be used from a distance without touching the person?
a) Mercury thermometer
b) Infrared thermometer
c) Digital thermometer
d) Laboratory thermometer
Answer: b) Infrared thermometer
The clinical thermometer is designed to measure temperatures between:
a) 0°C to 100°C
b) 10°C to 50°C
c) 35°C to 42°C
d) -10°C to 110°C
Answer: c) 35°C to 42°C
A laboratory thermometer is used for measuring:
a) Body temperature
b) Room temperature
c) Temperature of liquids in experiments
d) Food temperature
Answer: c) Temperature of liquids in experiments
The temperature at which ice melts is:
a) 0°C
b) 25°C
c) 50°C
d) 100°C
Answer: a) 0°C
What happens to the liquid inside a thermometer when the temperature increases?
a) It contracts
b) It evaporates
c) It expands and rises
d) It solidifies
Answer: c) It expands and rises
Which temperature scale is mostly used in scientific research?
a) Celsius
b) Fahrenheit
c) Kelvin
d) Rankine
Answer: c) Kelvin
Why is mercury used in thermometers?
a) It is cheap
b) It does not stick to glass
c) It is red in color
d) It is a solid
Answer: b) It does not stick to glass
The Celsius scale was invented by:
a) Daniel Fahrenheit
b) Anders Celsius
c) Lord Kelvin
d) Isaac Newton
Answer: b) Anders Celsius
The Fahrenheit scale is commonly used in:
a) India
b) Europe
c) USA
d) Africa
Answer: c) USA
Which instrument is used to measure air temperature?
a) Room thermometer
b) Clinical thermometer
c) Barometer
d) Speedometer
Answer: a) Room thermometer
What is the boiling point of water in Fahrenheit?
a) 100°F
b) 150°F
c) 212°F
d) 300°F
Answer: c) 212°F
Why should we not hold a laboratory thermometer by the bulb?
a) It can break easily
b) It may affect the temperature reading
c) It will stop working
d) It will heat up
Answer: b) It may affect the temperature reading
The Kelvin scale starts from:
a) 0°C
b) -273.15°C
c) 100°C
d) 32°F
Answer: b) -273.15°C
What is the main reason for replacing mercury thermometers with digital ones?
a) Mercury is expensive
b) Mercury is toxic
c) Mercury is too heavy
d) Digital thermometers are faster
Answer: b) Mercury is toxic
What should be done before using a thermometer?
a) Shake it well
b) Heat it
c) Wash it with soap and water
d) Freeze it
Answer: c) Wash it with soap and water
What is the temperature of absolute zero?
a) -100°C
b) -273.15°C
c) 0°C
d) 32°F
Answer: b) -273.15°C
Which property of liquids is used in thermometers?
a) Expansion and contraction
b) Evaporation
c) Freezing
d) Condensation
Answer: a) Expansion and contraction
What should be done after using a clinical thermometer?
a) Keep it in the freezer
b) Wash it with soap and water
c) Shake it to reset the reading
d) Both b and c
Answer: d) Both b and c
What is the use of a kink in a clinical thermometer?
a) To prevent mercury from rising too fast
b) To stop mercury from falling immediately
c) To make the thermometer look stylish
d) To increase the temperature reading
Answer: b) To stop mercury from falling immediately
What should not be used to measure body temperature?
a) Clinical thermometer
b) Laboratory thermometer
c) Digital thermometer
d) Infrared thermometer
Answer: b) Laboratory thermometer
Which scientist invented the Kelvin scale?
a) Lord Kelvin
b) Galileo Galilei
c) Newton
d) Einstein
Answer: a) Lord Kelvin

True or False:

The normal body temperature of a healthy human is 37°C. (True)
A clinical thermometer is used to measure room temperature. (False)
Mercury thermometers are being replaced by digital thermometers because mercury is toxic. (True)
The Celsius scale is also called the centigrade scale. (True)
Temperature can be measured using a barometer. (False)
Water boils at 100°C at sea level. (True)
A laboratory thermometer can be used to measure body temperature. (False)
Infrared thermometers can measure temperature without direct contact. (True)
Fahrenheit scale is more commonly used in the USA. (True)
Kelvin is the SI unit of temperature. (True)

Match the Following:

Column A	Column B
1. Clinical thermometer	a). Measures air temperature
2. Laboratory thermometer	b) Measures body temperature
3. Mercury	c) Used for experiments
4. Celsius scale	d) Toxic liquid metal
5. Fahrenheit scale	e) Used in most countries
6. 100°C	f) Used mainly in the
7. 0°C	g) USABoiling point of water
8. Infrared thermometer	h) Freezing point of water
9. Kelvin scale	i) Measures without contact
10. Room thermometer	j) SI unit of temperature

Answer:

Column A	Column B
1. Clinical thermometer	j) Measures body temperature
2. Laboratory thermometer	a) Used for experiments
3. Mercury	b) Toxic liquid metal
4. Celsius scale	c) Used in most countries
5. Fahrenheit scale	d) Used mainly in the USA
6. 100°C	e) Boiling point of water
7. 0°C	f) Freezing point of water
8. Infrared thermometer	g) Measures without contact
9. Kelvin scale	h) SI unit of temperature
10. Room thermometer	i) Measures air temperature

Assertion and Reasoning Questions:

Assertion (A): A laboratory thermometer is not suitable for measuring body temperature.
Reason (R): A laboratory thermometer does not have a kink to prevent mercury from falling immediately.
Answer: (Both A and R are true, and R is the correct explanation of A.)
Assertion (A): Mercury is used in thermometers.
Reason (R): Mercury expands uniformly with temperature changes.
Answer: (Both A and R are true, and R is the correct explanation of A.)
Assertion (A): Digital thermometers are safer than mercury thermometers.
Reason (R): Mercury is a poisonous substance that can be harmful if a thermometer breaks.
Answer: (Both A and R are true, and R is the correct explanation of A.)
Assertion (A): Water always boils at exactly 100°C.
Reason (R): Boiling point of water depends on atmospheric pressure.
Answer: (A is false, but R is true. Water boils at lower temperatures at higher altitudes.)
Assertion (A): Celsius and Fahrenheit scales are the only temperature scales used.
Reason (R): The Kelvin scale is the SI unit of temperature.
Answer: (A is false, but R is true. The Kelvin scale is also widely used in scientific research.)