The following 20 Multiple Choice Questions (MCQ) are based on
Chapter 7: Temperature and its Measurement from the NCERT Class 6
Science textbook Curiosity. Each question has four options - select the
best answer and click to check.
Instructions: Read each question carefully. Choose the most
appropriate option from (a), (b), (c), or (d). Click
Show Answer to reveal the correct answer with explanation.
Multiple Choice Questions
1Our sense of touch is not always reliable for judging:
(a) Temperature
(b) Colour
(c) Shape
(d) Length markings
(a) is correct
The same water can feel warm or cool depending on what the hand touched before.
2Temperature tells us:
(a) Its mass
(b) Its colour
(c) Its volume only
(d) How hot or cold a body is
(d) is correct
Temperature is a measurable indicator of hotness or coldness.
3The instrument used to measure temperature is a:
(a) Balance
(b) Compass
(c) Thermometer
(d) Metre scale
(c) is correct
Thermometers provide numerical temperature readings.
4A clinical thermometer is designed mainly to measure:
(a) Soil mass
(b) Human body temperature
(c) Boiling water
(d) Room length
(b) is correct
Its range is suited to temperatures near normal human body temperature.
5Normal human body temperature is approximately:
(a) 37.0 C
(b) 0 C
(c) 100 C
(d) 50 C
(a) is correct
The commonly accepted average is about 37 degrees Celsius, though normal readings vary slightly.
6Normal body temperature on the Fahrenheit scale is about:
(a) 32 F
(b) 212 F
(c) 0 F
(d) 98.6 F
(d) is correct
37 C corresponds to approximately 98.6 F.
7A digital clinical thermometer is preferred over an old mercury thermometer because it:
(a) Has no display
(b) Must be broken before use
(c) Avoids exposure to toxic mercury
(d) Cannot measure body temperature
(c) is correct
Digital thermometers are safer and provide direct readings.
8Before and after using a clinical thermometer, its tip should be:
(a) Dipped in paint
(b) Cleaned hygienically
(c) Heated in a flame
(d) Scratched
(b) is correct
Cleaning reduces transfer of germs between users.
9While measuring oral temperature, a person should avoid hot or cold food immediately before because it may:
(a) Distort the reading
(b) Change body mass
(c) Break every thermometer
(d) Stop blood flow
(a) is correct
Recent food or drink can temporarily change mouth temperature.
10A laboratory thermometer is used for:
(a) Only human fever
(b) Measuring length
(c) Finding direction
(d) Temperatures of substances during experiments
(d) is correct
Its wider range suits water and other laboratory materials.
11Why should a laboratory thermometer not be used as a clinical thermometer?
(a) It measures only mass
(b) It is always digital
(c) Its design and range are not meant for body use
(d) It has no scale
(c) is correct
Different thermometers are designed for different ranges and safe procedures.
12When reading a liquid-in-glass laboratory thermometer, the bulb should:
(a) Be held in the hand
(b) Be immersed without touching the container
(c) Touch the bottom firmly
(d) Remain outside the liquid
(b) is correct
Contact with the container can give a reading influenced by the vessel.
13The thermometer should be read with the eye:
(a) Level with the top of the liquid column
(b) Far above it
(c) Closed
(d) At any angle
(a) is correct
Eye-level viewing avoids parallax error.
14A laboratory thermometer should be kept in the substance while reading because:
(a) It has a permanent kink
(b) It measures only air
(c) It cannot be vertical
(d) Its level may change when removed
(d) is correct
Unlike a traditional clinical thermometer, it does not retain the maximum reading.
15The unit degree Celsius is written as:
(a) kg
(b) mL
(c) C with a degree symbol
(d) cm
(c) is correct
Celsius temperatures are expressed in degrees Celsius.
16Air temperature is normally measured with a thermometer placed:
(a) Inside boiling water
(b) In shade with free airflow
(c) In direct afternoon sunlight
(d) Against a hot wall
(b) is correct
Shade prevents direct radiation from heating the instrument above the actual air temperature.
17Daily maximum temperature is generally recorded as the:
(a) Highest air temperature of the day
(b) Average body temperature
(c) Lowest night reading
(d) Boiling point of water
(a) is correct
Maximum and minimum air temperatures describe the daily weather range.
18If one object is at 40 C and another at 20 C, the first is:
(a) Colder
(b) At the same temperature
(c) Without temperature
(d) Hotter
(d) is correct
A higher numerical temperature indicates greater hotness on the same scale.
19Why is measurement better than touching for checking fever?
(a) Hands always detect exact values
(b) Fever changes length
(c) It gives an objective numerical result
(d) Touch has a standard scale
(c) is correct
A thermometer reduces subjective error.
20Which action is unsafe with a glass thermometer?
(a) Holding the stem
(b) Handling it roughly or using it beyond its range
(c) Reading it at eye level
(d) Cleaning it carefully
(b) is correct
Glass may break, and excessive temperature can damage the instrument.
