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Class VI NCERT solutions Temperature and its Measurement

Class VI Science 📘 NCERT Solutions Ch 7: Temperature and its Measurement NCERT book: Curiosity
Updated 24 Feb 2026
Class VI Science • Curiosity

🌡️ Chapter 7: Temperature and its Measurement

NCERT Solutions — Complete Question & Answer Guide

UNIQUE STUDY POINT BY SUMEET SAHU | uniquestudyonline.com

📌 Key Concepts

✦ Temperature = measure of hotness or coldness

✦ Our sense of touch is not reliable for measuring temperature

✦ Clinical thermometer: 35°C to 42°C (body temperature)

✦ Laboratory thermometer: −10°C to 110°C (experiments)

✦ Normal body temperature: 37°C (98.6°F)

✦ Digital thermometers are safer, faster, mercury-free

✦ Conversion: °F = (°C × 9/5) + 32; °C = (°F − 32) × 5/9

📝 Let Us Enhance Our Learning

Q1 Normal temperature of a healthy human is close to:
ANSWER

Answer: (ii) 37.0°C (or 98.6°F).

Q2 37°C is same as:
ANSWER

Answer: (ii) 98.6°F

Conversion

°F = (°C × 9/5) + 32 = (37 × 9/5) + 32 = 66.6 + 32 = 98.6°F

Q3 Fill in the blanks.
ANSWER
StatementAnswer
(i) Hotness or coldness is determined by its ______.temperature
(ii) Temperature of ice-cold water cannot be measured by a ______ thermometer.clinical
(iii) The unit of temperature is degree ______.Celsius
Q4 Range of a laboratory thermometer:
ANSWER

Answer: (ii) −10°C to 110°C

Q5 Can a clinical thermometer measure boiling water temperature?
ANSWER

No. Clinical range is only 35°C to 42°C. Boiling water is 100°C — it would damage the thermometer and may be dangerous.

Q6 Why is a lab thermometer not used for body temperature?
ANSWER
  • Wider range (−10°C to 110°C) — less precise for body temp
  • No kink/constriction — mercury falls back after removing
  • Must be read while bulb stays immersed
Q7 Differentiate clinical and laboratory thermometers.
ANSWER
FeatureClinicalLaboratory
Range35°C to 42°C−10°C to 110°C
KinkHas a kinkNo kink
UseBody temperatureExperiments
ReadingAfter removing from bodyWhile bulb is immersed
Q8 Vaishnavi's temperature: (i) Highest? (ii) When? (iii) Normal when?
ANSWER

(i) Highest: 40.0°C

(ii) Day 1 at 7 PM

(iii) Returned to normal on Day 3

Q9 To measure 22.5°C, which thermometer?
ANSWER

Thermometer (b) — it has 0.5°C precision divisions. (a) has 1°C, (c) has 2°C steps.

Q10 Lab thermometer has 50 divisions between 0°C and 100°C. Each division = ?
ANSWER

100°C ÷ 50 = 2°C per division

Q11 Someone says fever is 101 degrees. Celsius or Fahrenheit? Convert.
ANSWER

It's Fahrenheit (101°C would be above boiling point — impossible for body).

°C = (101 − 32) × 5/9 = 69 × 5/9 = 38.3°C (mild fever; normal = 37°C).

Q12 Advantages of digital over mercury thermometers?
ANSWER
  • No toxic mercury — safer
  • Instant digital readings
  • No parallax error
  • If broken, no danger
  • Beep sound when done

UNIQUE STUDY POINT BY SUMEET SAHU

Amitesh Nagar, Indore, Madhya Pradesh | uniquestudyonline.com

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Sumeet Sahu (14 years of teaching experience), Unique Study Point, Amitesh Nagar, Indore. Free NCERT/CBSE study material for Class VI to X.