Temperature plays an important role in our daily lives and scientific studies. This chapter explains how temperature is measured. It also deals wit the different types of thermometers, and the importance of standard units like Celsius, Fahrenheit, and Kelvin. The following MCQs will help you revise and test your understanding of this topic effectively.
MCQ Questions for Class 6 Science Chapter 7 Temperature and its Measurement
Question 1: Which sense-based method is unreliable for judging hotness or coldness?
a) Seeing
b) Touching
c) Smelling
d) Hearing
Answer:
b) Touching — Sense of touch can mislead; a reliable measure is temperature using a thermometer.
Question 2: What is a reliable measure of the hotness or coldness of a body?
a) Weight
b) Temperature
c) Colour
d) Shape
Answer:
b) Temperature — Temperature compares how hot one body is relative to another.
Question 3: A device used to measure temperature is called a:
a) Barometer
b) Thermometer
c) Hygrometer
d) Speedometer
Answer:
b) Thermometer — Thermometers are designed to measure temperature.
Question 4: Which thermometer is used to measure human body temperature?
a) Laboratory thermometer
b) Digital clinical thermometer
c) Room thermometer
d) Maximum–minimum thermometer
Answer:
b) Digital clinical thermometer — It is used for measuring body temperature.
Question 5: Why are digital clinical thermometers preferred over mercury thermometers?
a) They are cheaper
b) Mercury is toxic and disposal is difficult
c) They are heavier
d) They need no batteries
Answer:
b) Mercury is toxic and disposal is difficult — Digital types avoid mercury risk and are easy to read.
Question 6: Thermometers used during the COVID-19 pandemic to measure temperature from a distance are called:
a) Clinical mercury thermometers
b) Infrared (non-contact) thermometers
c) Laboratory thermometers
d) Room thermometers
Answer:
b) Infrared (non-contact) thermometers — They can measure without touching the person.
Question 7: On the Celsius scale, the unit of temperature is written as:
a) °c
b) °C
c) oc
d) c°
Answer:
b) °C — Degree Celsius is denoted by °C.
Question 8: The normal temperature of a healthy human adult is taken to be:
a) 32.0 °C
b) 35.0 °C
c) 37.0 °C
d) 42.0 °C
Answer:
c) 37.0 °C — Normal adult body temperature is about 37.0 °C (average of many healthy people).
Question 9: 37.0 °C is equal to how many degrees Fahrenheit?
a) 97.4 °F
b) 97.6 °F
c) 98.4 °F
d) 98.6 °F
Answer:
d) 98.6 °F — 37.0 °C corresponds to 98.6 °F.
Question 10: The SI unit of temperature is:
a) Degree Celsius
b) Degree Fahrenheit
c) Kelvin
d) Rankine
Answer:
c) Kelvin — The SI unit is kelvin (symbol K).
Question 11: What is the correct way to write the kelvin unit?
a) °K
b) k
c) K
d) Kelvin°
Answer:
c) K — ‘kelvin’ in words uses a lower-case k, symbol is capital K and no degree sign.
Question 12: When measuring body temperature in the armpit, the reading is usually:
a) 0.5–1 °C higher than actual
b) 0.5–1 °C lower than actual
c) Exactly the same
d) Unreadable
Answer:
b) 0.5–1 °C lower than actual — Armpit measurements typically read slightly lower.
Question 13: A clinical thermometer should NOT be used to measure:
a) Body temperature
b) Boiling water temperature
c) Fever temperature
d) Armpit temperature
Answer:
b) Boiling water temperature — Boiling water and ice are outside a clinical thermometer’s range.
Question 14: The liquid commonly used in a laboratory thermometer is:
a) Water
b) Alcohol (coloured) or mercury
c) Kerosene
d) Oil
Answer:
b) Alcohol (coloured) or mercury — These expand uniformly and are visible in the tube.
Question 15: A typical laboratory thermometer has a range of:
a) 0 °C to 50 °C
b) –10 °C to 110 °C
c) 32 °C to 45 °C
d) –50 °C to 50 °C
Answer:
b) –10 °C to 110 °C — Many lab thermometers cover this range.
Question 16: If the difference between two big marks on a lab thermometer is 10 °C and there are 10 small divisions between them, the least count is:
a) 0.1 °C
b) 0.5 °C
c) 1 °C
d) 2 °C
Answer:
c) 1 °C — Each small division represents 10/10 = 1 °C.
Question 17: Which is NOT a correct precaution while using a laboratory thermometer?
a) Hold it vertically
b) Read at eye level
c) Let the bulb touch the beaker bottom
d) Read while it is immersed in liquid
Answer:
c) Let the bulb touch the beaker bottom — The bulb should not touch the sides or bottom.
Question 18: The correct way to read temperature with a lab thermometer is to:
a) Tilt the thermometer to see the level
b) Read after taking it out of the liquid
c) Keep it vertical and read at eye level while immersed
d) Shake it before reading
Answer:
c) Keep it vertical and read at eye level while immersed — Otherwise readings can be wrong.
Question 19: In Shillong, recorded boiling-water temperatures around 98.0 °C suggest that:
a) The thermometer is faulty
b) Boiling point decreases at higher altitudes
c) Water there never boils
d) Boiling point is always 100.0 °C
Answer:
b) Boiling point decreases at higher altitudes — Lower air pressure reduces boiling point.
Question 20: During boiling, the temperature of water:
a) Keeps rising steadily
b) Falls continuously
c) Remains constant while it boils
d) Becomes unpredictable
Answer:
c) Remains constant while it boils — Similarly, ice stays at constant temperature while melting.
Question 21: A room thermometer hung on a wall gives an approximate idea of:
a) Body temperature
b) Room (air) temperature
c) Soil temperature
d) Water temperature
Answer:
b) Room (air) temperature — It indicates the air temperature of the room.
Question 22: Weather reports usually mention:
a) Only rainfall
b) Only wind speed
c) Maximum and minimum air temperatures
d) Ocean currents
Answer:
c) Maximum and minimum air temperatures — These vary daily with changing weather.
Question 23: The conversion from Celsius to kelvin is given by:
a) K = °C + 100
b) K = °C + 273.15
c) K = °C – 273.15
d) K = 2 × °C
Answer:
b) K = °C + 273.15 — This converts Celsius temperature to kelvin.
Question 24: Which statement about unit names and symbols is correct?
a) ‘Degree’ always starts with capital D
b) Write °K for kelvin
c) Celsius/Fahrenheit are capitalised; ‘degree’ is not
d) Add a full stop after unit symbols
Answer:
c) Celsius/Fahrenheit are capitalised; ‘degree’ is not — Also, K has no degree sign and symbols take no full stop.
Question 25: The lowest possible temperature, called absolute zero, is approximately:
a) –100 °C
b) –273.15 °C
c) 0 °C
d) 273.15 °C
Answer:
b) –273.15 °C — This corresponds to 0 K.
Question 26: Before measuring with a digital clinical thermometer, one should:
a) Heat the tip
b) Press the reset button and wash the tip
c) Shake it vigorously
d) Add ice to cool it
Answer:
b) Press the reset button and wash the tip — Clean and reset before use.
Question 27: Where should a digital clinical thermometer be placed for oral measurement?
a) Under the tongue with mouth closed
b) On the tongue with mouth open
c) Inside the nose
d) On the cheek
Answer:
a) Under the tongue with mouth closed — Wait for the beep/light to read.
Question 28: After measuring temperatures of many healthy people, the ‘normal’ body temperature is considered as an:
a) Exact same value for everyone
b) Average value around 37.0 °C
c) Minimum value of the day
d) Maximum value of the day
Answer:
b) Average value around 37.0 °C — Individuals may vary slightly due to age, time, activity, etc.
Question 29: Which person is known as the ‘Weather Woman of India’ for her work on instruments and renewable energy?
a) Kalpana Chawla
b) Anna Mani
c) Sunita Williams
d) Indira Gandhi
Answer:
b) Anna Mani — She built numerous weather instruments and advanced wind/solar studies in India.
Question 30: Which of the following is a correct precaution for a lab thermometer?
a) Hold it by the bulb for stability
b) Read it after removing from water
c) Handle with care; do not hold by the bulb
d) Keep it tilted for easier viewing
Answer:
c) Handle with care; do not hold by the bulb — Also keep it vertical and read at eye level while immersed.
Fill in the Blanks Questions for Class 6 Science Chapter 7 Temperature and its Measurement
1. The device used to measure temperature is called a ___.
Answer:
Thermometer
2. The normal temperature of a healthy human adult is about ___ °C.
Answer:
37.0 °C
3. The SI unit of temperature is ___.
Answer:
Kelvin (K)
4. The normal body temperature of 37 °C is equal to ___ °F.
Answer:
98.6 °F
5. The liquid commonly used in laboratory thermometers is either mercury or ___.
Answer:
Coloured alcohol
6. A laboratory thermometer usually has a range from ___ °C to ___ °C.
Answer:
–10 °C to 110 °C
7. The lowest possible temperature, also called absolute zero, is ___ °C.
Answer:
–273.15 °C
8. In Shillong, water boils at about ___ °C because the boiling point decreases at high altitudes.
Answer:
98.0 °C
9. During boiling of water or melting of ice, the temperature of the substance remains ___.
Answer:
Constant
10. Anna Mani, also known as the ‘Weather Woman of India’, developed many instruments for measuring ___.
Answer:
Weather parameters (like temperature, pressure, wind, etc.)
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