Class 6 Science · Original EZT practice
Temperature and its Measurement (Class 6 Science Chapter 7): how hot is hot, exactly?
Touch tells you "warm" or "cold", but it can fool you - the same bowl of water can feel warm to one hand and cool to the other. To be sure, we measure temperature. Below: what temperature is, how thermometers and the Celsius and Fahrenheit scales work, then original EZT practice with worked answers. (Note: this is original practice, not a textbook exercise key.)
10 original worked examples, 10 fresh self-check questions, with explained answers. These are not copied textbook exercises, an official chapter index or a full answer key. No affiliation with NCERT is claimed.
Official sources for topic and edition context, checked 17 October 2026:
1. Why touch is not enough
Our sense of touch compares, it does not measure. Dip one hand in warm water and the other in cool water, then put both in the same bowl - the same water feels different to each hand. That is why we need an instrument.
2. Temperature and thermometers
Temperature tells us how hot or cold a body is, and a thermometer measures it. Two common kinds: the clinical thermometer for body temperature (digital ones are common now - no mercury, beep when ready) and the laboratory thermometer for experiments.
3. The Celsius scale
The Celsius scale is the one used most in India. Its unit is the degree Celsius (C). Normal human body temperature is about 37.0 C (a little up or down is normal - it changes with time of day, activity and weather).
4. The Fahrenheit scale
Another scale you will meet is the Fahrenheit scale (F). The same normal body temperature, 37.0 C, equals 98.6 F. To convert: F = (9/5) x C + 32, and back: C = (F - 32) x 5/9.
5. Reading air temperature
Weather reports give air temperature, measured with thermometers placed in shade. Maximum and minimum temperatures of the day tell us how hot the afternoon got and how cool the night was.
Choose, solve, check, then try a fresh question.
Before calculating, read the method prompt and name the condition that makes it useful. Write your own attempt. Open the steps only when you need them, and use the check to catch a wrong sign, unit or interpretation. Finish with the fresh question before reading its answer.
Riya takes her left hand out of warm water and her right hand out of cool...
Choose the method: Our sense of touch compares, it does not measure.
EZT practice question
Riya takes her left hand out of warm water and her right hand out of cool water, then dips both into one bowl of tap water. What does each hand feel?
Show the worked solution
- Identify whether the question is about touch, temperature, the instrument or the scale.
- Use the thermometer rule or the Celsius-Fahrenheit conversion that fits.
- State the result with the correct unit and a plain reason.
Answer: the left hand feels the water as cooler, the right hand feels it as warmer - touch compares with what the hand felt before, so it cannot be trusted to measure.
Check: The instrument, scale, conversion and unit in the answer match the situation in the question.
Watch for this: Do not trust touch as a measuring instrument and do not mix up Celsius and Fahrenheit; convert before comparing temperatures on different scales.
Now try it yourself
Create one new example by changing the numbers, characters, object or setup and solve it by the same rule.
Check your answer
Keep the final result in your notebook; the page-level Try It prompts are intentionally answer-free.
The worked answer above shows the method; independent practice should not become another answer key.
Why should a laboratory thermometer not be used to measure body temperature?
Choose the method: Temperature tells us how hot or cold a body is, and a thermometer measures it.
EZT practice question
Why should a laboratory thermometer not be used to measure body temperature?
Show the worked solution
- Identify whether the question is about touch, temperature, the instrument or the scale.
- Use the thermometer rule or the Celsius-Fahrenheit conversion that fits.
- State the result with the correct unit and a plain reason.
Answer: it is built for a different range and use; body temperature stays in a narrow band near 37 C, which the clinical thermometer is designed to read precisely and safely.
Check: The instrument, scale, conversion and unit in the answer match the situation in the question.
Watch for this: Do not trust touch as a measuring instrument and do not mix up Celsius and Fahrenheit; convert before comparing temperatures on different scales.
Now try it yourself
Create one new example by changing the numbers, characters, object or setup and solve it by the same rule.
Check your answer
Keep the final result in your notebook; the page-level Try It prompts are intentionally answer-free.
The worked answer above shows the method; independent practice should not become another answer key.
Name one reason digital clinical thermometers have replaced old mercury ones...
Choose the method: Temperature tells us how hot or cold a body is, and a thermometer measures it.
EZT practice question
Name one reason digital clinical thermometers have replaced old mercury ones in most homes.
Show the worked solution
- Identify whether the question is about touch, temperature, the instrument or the scale.
- Use the thermometer rule or the Celsius-Fahrenheit conversion that fits.
- State the result with the correct unit and a plain reason.
Answer: they are safer - no glass to break and no toxic mercury - and they give a quick digital reading.
Check: The instrument, scale, conversion and unit in the answer match the situation in the question.
Watch for this: Do not trust touch as a measuring instrument and do not mix up Celsius and Fahrenheit; convert before comparing temperatures on different scales.
Now try it yourself
Create one new example by changing the numbers, characters, object or setup and solve it by the same rule.
Check your answer
Keep the final result in your notebook; the page-level Try It prompts are intentionally answer-free.
The worked answer above shows the method; independent practice should not become another answer key.
A child's thermometer reads 38.5 C. Is that normal?
Choose the method: The Celsius scale is the one used most in India.
EZT practice question
A child's thermometer reads 38.5 C. Is that normal?
Show the worked solution
- Identify whether the question is about touch, temperature, the instrument or the scale.
- Use the thermometer rule or the Celsius-Fahrenheit conversion that fits.
- State the result with the correct unit and a plain reason.
Answer: no - 38.5 C is clearly above the normal band around 37.0 C; the child likely has a fever and an adult should be told.
Check: The instrument, scale, conversion and unit in the answer match the situation in the question.
Watch for this: Do not trust touch as a measuring instrument and do not mix up Celsius and Fahrenheit; convert before comparing temperatures on different scales.
Now try it yourself
Create one new example by changing the numbers, characters, object or setup and solve it by the same rule.
Check your answer
Keep the final result in your notebook; the page-level Try It prompts are intentionally answer-free.
The worked answer above shows the method; independent practice should not become another answer key.
Morning readings of a healthy family: 36.7 C, 37.1 C, 36.9 C. Do all three...
Choose the method: The Celsius scale is the one used most in India.
EZT practice question
Morning readings of a healthy family: 36.7 C, 37.1 C, 36.9 C. Do all three count as normal?
Show the worked solution
- Identify whether the question is about touch, temperature, the instrument or the scale.
- Use the thermometer rule or the Celsius-Fahrenheit conversion that fits.
- State the result with the correct unit and a plain reason.
Answer: yes - normal body temperature is about 37.0 C but small differences person to person are expected.
Check: The instrument, scale, conversion and unit in the answer match the situation in the question.
Watch for this: Do not trust touch as a measuring instrument and do not mix up Celsius and Fahrenheit; convert before comparing temperatures on different scales.
Now try it yourself
Create one new example by changing the numbers, characters, object or setup and solve it by the same rule.
Check your answer
Keep the final result in your notebook; the page-level Try It prompts are intentionally answer-free.
The worked answer above shows the method; independent practice should not become another answer key.
Convert 25 C to Fahrenheit.
Choose the method: Another scale you will meet is the Fahrenheit scale (F).
EZT practice question
Convert 25 C to Fahrenheit.
Show the worked solution
- Identify whether the question is about touch, temperature, the instrument or the scale.
- Use the thermometer rule or the Celsius-Fahrenheit conversion that fits.
- State the result with the correct unit and a plain reason.
Answer: (9/5) x 25 + 32 = 45 + 32 = 77 F.
Check: The instrument, scale, conversion and unit in the answer match the situation in the question.
Watch for this: Do not trust touch as a measuring instrument and do not mix up Celsius and Fahrenheit; convert before comparing temperatures on different scales.
Now try it yourself
Create one new example by changing the numbers, characters, object or setup and solve it by the same rule.
Check your answer
Keep the final result in your notebook; the page-level Try It prompts are intentionally answer-free.
The worked answer above shows the method; independent practice should not become another answer key.
Convert 10 C to Fahrenheit.
Choose the method: Another scale you will meet is the Fahrenheit scale (F).
EZT practice question
Convert 10 C to Fahrenheit.
Show the worked solution
- Identify whether the question is about touch, temperature, the instrument or the scale.
- Use the thermometer rule or the Celsius-Fahrenheit conversion that fits.
- State the result with the correct unit and a plain reason.
Answer: (9/5) x 10 + 32 = 18 + 32 = 50 F.
Check: The instrument, scale, conversion and unit in the answer match the situation in the question.
Watch for this: Do not trust touch as a measuring instrument and do not mix up Celsius and Fahrenheit; convert before comparing temperatures on different scales.
Now try it yourself
Create one new example by changing the numbers, characters, object or setup and solve it by the same rule.
Check your answer
Keep the final result in your notebook; the page-level Try It prompts are intentionally answer-free.
The worked answer above shows the method; independent practice should not become another answer key.
A weather report from the US says 68 F. What is that in Celsius?
Choose the method: Another scale you will meet is the Fahrenheit scale (F).
EZT practice question
A weather report from the US says 68 F. What is that in Celsius?
Show the worked solution
- Identify whether the question is about touch, temperature, the instrument or the scale.
- Use the thermometer rule or the Celsius-Fahrenheit conversion that fits.
- State the result with the correct unit and a plain reason.
Answer: (68 - 32) x 5/9 = 36 x 5/9 = 20 C.
Check: The instrument, scale, conversion and unit in the answer match the situation in the question.
Watch for this: Do not trust touch as a measuring instrument and do not mix up Celsius and Fahrenheit; convert before comparing temperatures on different scales.
Now try it yourself
Create one new example by changing the numbers, characters, object or setup and solve it by the same rule.
Check your answer
Keep the final result in your notebook; the page-level Try It prompts are intentionally answer-free.
The worked answer above shows the method; independent practice should not become another answer key.
Water boils at 212 F. Show this is 100 C.
Choose the method: Another scale you will meet is the Fahrenheit scale (F).
EZT practice question
Water boils at 212 F. Show this is 100 C.
Show the worked solution
- Identify whether the question is about touch, temperature, the instrument or the scale.
- Use the thermometer rule or the Celsius-Fahrenheit conversion that fits.
- State the result with the correct unit and a plain reason.
Answer: (212 - 32) x 5/9 = 180 x 5/9 = 100 C.
Check: The instrument, scale, conversion and unit in the answer match the situation in the question.
Watch for this: Do not trust touch as a measuring instrument and do not mix up Celsius and Fahrenheit; convert before comparing temperatures on different scales.
Now try it yourself
Create one new example by changing the numbers, characters, object or setup and solve it by the same rule.
Check your answer
Keep the final result in your notebook; the page-level Try It prompts are intentionally answer-free.
The worked answer above shows the method; independent practice should not become another answer key.
Which is hotter, a day at 30 C or a day at 86 F?
Choose the method: Another scale you will meet is the Fahrenheit scale (F).
EZT practice question
Which is hotter, a day at 30 C or a day at 86 F?
Show the worked solution
- Identify whether the question is about touch, temperature, the instrument or the scale.
- Use the thermometer rule or the Celsius-Fahrenheit conversion that fits.
- State the result with the correct unit and a plain reason.
Answer: they are the same - (9/5) x 30 + 32 = 54 + 32 = 86 F.
Check: The instrument, scale, conversion and unit in the answer match the situation in the question.
Watch for this: Do not trust touch as a measuring instrument and do not mix up Celsius and Fahrenheit; convert before comparing temperatures on different scales.
Now try it yourself
Create one new example by changing the numbers, characters, object or setup and solve it by the same rule.
Check your answer
Keep the final result in your notebook; the page-level Try It prompts are intentionally answer-free.
The worked answer above shows the method; independent practice should not become another answer key.
Try it yourself
Work these on paper before checking any notes. Answers are deliberately not shown here.
- Why can two hands disagree about the same water?
- Convert 15 C to Fahrenheit.
- Convert 50 F to Celsius.
- Which thermometer belongs in a school lab beaker, and which under a tongue?
- A friend reads 37.4 C - normal or fever?
Know the rule but lose track of the steps?
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Questions about this practice page
- What is temperature?
- a measure of how hot or cold a body is, read with a thermometer.
- What is normal human body temperature?
- about 37.0 C, which equals 98.6 F; small differences between people and times of day are normal.
- What is the difference between a clinical and a laboratory thermometer?
- a clinical thermometer measures body temperature in a narrow range near 37 C; a laboratory thermometer covers a wider range for experiments.
- How do you convert Celsius to Fahrenheit?
- multiply by 9/5 and add 32 - for example 25 C = 77 F.
- Are these the NCERT exercise questions for Temperature and its Measurement?
- No. EZT pages are original practice on this chapter - use them to prepare for the textbook exercises, not as a substitute for your book.