Chapter 7 Temperature and its Measurement Class 6 Extra Questions and Answers Science Curiosity

Temperature and its Measurement Class 6 Multiple Choice Questions (MCQs)

1. The normal temperature of a healthy human being is close to:

a) 98.6°C
b) 37.0°C ✅
c) 32.0°C
d) 27.0°C

2. 37°C is the same temperature as:

a) 97.4°F
b) 97.6°F
c) 98.4°F
d) 98.6°F ✅

3. The hotness or coldness of a system is determined by its:

a) Heat
b) Temperature ✅
c) Energy
d) Climate

4. The temperature of ice-cold water cannot be measured by a:

a) Laboratory thermometer
b) Digital thermometer
c) Clinical thermometer ✅
d) Room thermometer

5. The unit of temperature is:

a) Kelvin
b) Fahrenheit
c) Celsius ✅
d) Heat

6. The range of a laboratory thermometer is usually:

a) 10°C to 100°C
b) –10°C to 110°C ✅
c) 32°C to 45°C
d) 35°C to 42°C

7. Four students used a laboratory thermometer to measure temperature. Who followed the correct way?

a) Student 1
b) Student 2
c) Student 3
d) Student 4 ✅

8. Which thermometer is used to measure human body temperature?

a) Laboratory thermometer
b) Clinical thermometer ✅
c) Room thermometer
d) Alcohol thermometer

9. Mercury is not used nowadays in thermometers because it is:

a) Heavy
b) Colourless
c) Poisonous ✅
d) Costly

10. Digital thermometers measure temperature using:

a) Mercury
b) Alcohol
c) Heat sensors ✅
d) Water

11. Thermometers that measure temperature without touching are called:

a) Clinical thermometers
b) Laboratory thermometers
c) Infrared thermometers ✅
d) Alcohol thermometers

12. The SI unit of temperature is:

a) Celsius
b) Fahrenheit
c) Kelvin ✅
d) Degree

13. Degree sign (°) is not written with:

a) Celsius
b) Fahrenheit
c) Kelvin ✅
d) Temperature

14. The temperature shown by the thermometer in Fig. 7.10 is:

a) 28.0°C
b) 27.5°C
c) 26.5°C ✅
d) 25.3°C

15. While measuring temperature using a laboratory thermometer, it should be held:

a) Slanting
b) Horizontal
c) Vertical ✅
d) Upside down

16. A laboratory thermometer has 50 divisions between 0°C and 100°C. Each division measures:

a) 1°C
b) 2°C ✅
c) 5°C
d) 10°C

17. Komal says she has a fever of 101 degrees. This is on which scale?

a) Celsius
b) Kelvin
c) Fahrenheit ✅
d) Room

18. Small children usually have __________ body temperature than adults.

a) Lower
b) Same
c) Higher ✅
d) Zero

19. Old people usually have __________ body temperature than young adults.

a) Higher
b) Lower ✅
c) Same
d) Very high

20. Temperature of boiling water remains __________ while boiling.

a) Increasing
b) Decreasing
c) Constant ✅
d) Zero

21. Who is known as the “Weather Woman of India”?

a) Kalpana Chawla
b) Anna Mani ✅
c) Sarojini Naidu
d) Indira Gandhi

Temperature and its Measurement Class 6 Fill in the Blanks (Fill ups)

  1. The reliable measure of hotness or coldness of a body is called Temperature.
  2. The device used to measure temperature is called a Thermometer.
  3. The normal temperature of a healthy human body is 37.0 °C.
  4. 37°C is equal to 98.6 °F.
  5. The SI unit of temperature is Kelvin.
  6. The temperature scale commonly used in clinical thermometers is Celsius scale.
  7. Clinical thermometers are used to measure body temperature.
  8. Laboratory thermometers are generally filled with mercury or coloured alcohol.
  9. The range of a laboratory thermometer is usually from –10 °C to 110 °C.
  10. Mercury is not used nowadays because it is poisonous.
  11. Digital thermometers measure temperature using heat sensors.
  12. Thermometers that measure temperature without touching are called infrared / non-contact thermometers.
  13. The Fahrenheit unit is written as °F.
  14. The Celsius unit is written as °C.
  15. The Kelvin unit is written as K.
  16. Degree sign (°) is not used with Kelvin.
  17. The smallest value a thermometer can read is called its least count.
  18. Anna Mani is known as the Weather Woman of India.
  19. Digital thermometers run on batteries.
  20. While measuring temperature, the thermometer should be held vertically.
  21. The eye should be in line with the liquid level while reading temperature.
  22. The temperature of boiling water remains constant while boiling.
  23. The temperature of ice remains constant while melting.
  24. Air temperature is an important weather parameter.
  25. Small children usually have higher body temperature than adults.
  26. Old people usually have lower body temperature than young adults.
  27. The temperature of humans normally does not go below 35 °C.
  28. The temperature of humans normally does not go above 42 °C.
  29. Pulse rate alone is not a reliable indicator of fever.
  30. Absolute zero is equal to 0 kelvin.

Temperature and its Measurement Class 6 True or False

  1. Mercury thermometers are still widely used because mercury is safe to handle. False
  2. The Celsius scale is more commonly used than the Fahrenheit scale in scientific studies. True
  3. A clinical thermometer can measure temperatures ranging from -10°C to 110°C. False
  4. Absolute zero is the highest temperature that can be measured. False
  5. Digital thermometers are easier to read than mercury thermometers. True
  6. A laboratory thermometer is suitable for measuring the temperature of boiling water. True
  7. The Kelvin scale uses the degree symbol (°) to denote temperature. False
  8. The temperature of a body tells us how hot or cold it is. True
  9. A clinical thermometer is used for measuring the temperature of liquids. False
  10. The temperature of boiling water remains constant while it is boiling. True

Temperature and its Measurement Class 6 Extra Questions Answers

Temperature and its Measurement Class 6 Most Important Extra Question Answers :-

Q1. What is temperature?
Ans:- Temperature tells us how hot or cold a body is.

Q2. Can fever be judged only by touching a person?
Ans:- No. Touch is not reliable. Fever should be checked using a thermometer.

Q3. Why can’t we rely on our sense of touch?
Ans:- Because the same object can feel hot or cold to different hands. So touch can mislead us.

Q4. What is a thermometer?
Ans:- A thermometer is an instrument used to measure temperature.

Q5. What are the two main types of thermometers?
Ans:- Clinical thermometer and Laboratory thermometer.

Q6. What is a clinical thermometer used for?
Ans:- It is used to measure human body temperature.

Q7. Which scale is used in clinical thermometers?
Ans:- Celsius scale.

Q8. What is a mercury thermometer?

Ans:- A mercury thermometer is a thermometer that uses mercury to measure temperature.

Q9. How did a mercury thermometer work?

Ans:- In a mercury thermometer, mercury rises when the temperature increases and falls when the temperature decreases. The level of mercury on the scale shows the temperature.

Q10. Why are mercury thermometers not used now?

Ans:- Mercury is an extremely toxic substance and is difficult to dispose of if the thermometer breaks accidentally. Therefore, mercury thermometers are not used now.

Q11. Which thermometers are replacing mercury thermometers?

Ans:- Digital thermometers are replacing mercury thermometers.

Q12. Give two reasons why digital thermometers are preferred over mercury thermometers.

Ans:- Digital thermometers pose no risk because they do not contain mercury.

The numbers on the digital display are easier to read.

Q13. What are digital thermometers?
Ans:- They are thermometers that use heat sensors and show temperature on a digital display.

Q14. Why are digital thermometers preferred?
Ans:- They are safe, easy to read and do not contain mercury.

Q15. How does a digital thermometer work?
Ans:- It measures temperature using heat sensors.

Q16. What thermometers were used during COVID-19?
Ans:- Non-contact thermometers.

Q17. What are non-contact thermometers?
Ans:- They measure temperature from a distance without touching the body using infrared rays.

Q18. How to measure body temperature using digital thermometer?
Ans:-  Clean the tip, place it under the tongue, wait for beep, read temperature.

Q19. Precautions while using digital thermometer.

Ans:- The following precautions are to be taken while using a digital clinical thermometer.

  • To be used after reading the instruction manual of the thermometer.
  • Tip of the thermometer to be washed with soap and water before and after use.
  • While washing, care to be taken to keep the digital portion such as the display out of water.
  • Do not hold the thermometer by the tip.

Q20. What is the normal temperature of a healthy human body?
Ans:- 37°C or 98.6°F.

Q21. Does everyone have exactly 37 °C?
Ans:- No, it may vary slightly.

Q22. Why does body temperature vary?
Ans:- Due to age, time of day and activity level.

Q23. Between which temperatures does the human body temperature normally remain?
Ans:- The temperature of human beings normally does not go below 35°C or above 42°C.

Q24. What is Fahrenheit scale?
Ans:- A temperature scale with unit degree Fahrenheit (°F).

Q25. What is Kelvin scale?
Ans:- A scientific temperature scale with unit kelvin (K).

Q26. What is the SI unit of temperature?
Ans:- Kelvin (K).

Q27. Name the three temperature scales.
Ans:- Celsius, Fahrenheit and Kelvin.

Q28. Formula to convert °C to K?
Ans:- K = °C + 273.15

Q29. How are the names of temperature scales written and how are their units written?
Ans:- The names of temperature scales—Celsius scale, Fahrenheit scale and Kelvin scale—start with a capital letter. For the units for temperature, degree Celsius and degree Fahrenheit, the word degree starts with a lower-case letter while Celsius and Fahrenheit start with a capital letter. The unit kelvin starts with a lower-case letter. The symbols of all units (°C, °F, K) are capital letters. Note that degree sign (°) is not written with K.

Q30. Why is the degree sign (°) not written with kelvin?
Ans:- Because Because kelvin is an absolute unit and it is written as K without the degree sign.

Q31. What rules should be followed while writing temperature?
Ans:- A space is left between the number and the unit, and for more than one degree, the plural form “degrees” is used.

Q32. How was fever detected earlier?
Ans:-  By checking pulse rate.

Q33. Why pulse rate is not reliable?
Ans:-  Because it changes due to many reasons.

Q34. Can clinical thermometer measure boiling water?
Ans:- No, it is out of its range.

Q35. How to measure higher temperatures?
Ans:- By using laboratory thermometer or infrared thermometer.

Q36. What is a laboratory thermometer used for?
Ans:- It is used to measure temperature of liquids, air and other substances in laboratories.

Q37. What is the range of a laboratory thermometer?
Ans:- –10°C to 110°C.

Q38. What liquids are generally used in a laboratory thermometer and why is alcohol coloured red?
Ans:- Alcohol or mercury is generally used in a laboratory thermometer. Alcohol is coloured red so that it can be easily seen.

Q39. Precautions while using a laboratory thermometer:
Ans:- • Handle carefully
• Do not hold by bulb
• Hold vertically
• Bulb should not touch beaker
• Read while immersed

Q40. Main parts of lab thermometer?
Ans:- Bulb, glass tube, liquid column, scale.

Q41. How to calculate smallest division?
Ans:- Divide temperature difference by number of divisions.

Q42. Why can’t a laboratory thermometer measure body temperature?
Ans:- Because it has no kink and is not designed for body use.

Q43. What is the correct way of measuring temperature?

Ans:- The correct way of measuring temperature are following:-

  • Keep the thermometer upright (vertical).
  • Make sure the bulb does not touch the sides or bottom of the container.
  • Read the temperature while the thermometer is still immersed in the liquid.
  • Note the reading at eye level.

Q44. Why temperature constant while boiling?
Ans:- Heat is used to change state.

Q45. Why should thermometer be held vertically?
Ans:- To get correct reading.

Q46. Why must temperature be read while immersed?
Ans:- Because liquid level falls when thermometer is taken out.

Q47. What is the smallest value a thermometer can read?
Ans:- It is called least count.

Q48. How do you find least count?
Ans:- Divide temperature between two big marks by number of small divisions.

Q49. Why do students get different boiling water readings?
Ans:- Because some may not follow correct method.

Q50. What is air temperature?
Ans:- Air temperature is a measure of how hot or cold the air is. 

Q51. Why does air temperature change daily?
Ans:- Because weather changes every day.

Q52. Who was Anna Mani?
Ans:- She was an Indian scientist.

Q53. Why is Anna Mani called Weather Woman of India?
Ans:- Because she made weather instruments and helped India in weather studies.

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