Class 6 Science Chapter 7 MCQ Temperature and its Measurement
MCQ on Temperature and its Measurement Class 6
1. Choose the correct option in the following questions
Question 1.
What device measures temperature?
(a) Barometer
(b) Thermometer
(c) Hygrometer
(d) Anemometer
Answer:
(b) Thermometer
Question 2.
What is the normal temperature of a healthy human body in Celsius?
(a) 35.0 °C
(b) 36.0 °C
(c) 37.0 °C
(d) 38.0 °C
Answer:
(c) 37.0 °C
Question 3.
Which is substance was traditionally used in thermometers but is now avoided due to toxicity?
(a) Alcohol
(b) Mercury
(c) Water
(d) Glycerin
Answer:
(b) Mercury
Question 4.
Digital thermometers measure temperature using whichsensors?
(a) Light sensors
(b) Sound sensors
(c) Heat sensors
(d) Pressure sensors
Answer:
(c) Heat sensors
Question 5.
Which scale is commonly used in clinical thermometers?
(a) Kelvin
(b) Fahrenheit
(c) Rankine
(d) Celsius
Answer:
(d) Celsius
Question 6.
What is the unit of temperature in the Kelvin scale?
(a) Degree Kelvin
(b) Kelvin
(c) Degree Celsius
(d) Degree Fahrenheit
Answer:
(b) Kelvin
Question 7.
What is the normal temperature of a healthy human body in Fahrenheit?
(a) 97.6 °F
(b) 98.6 °F
(c) 99.6 °F
(d) 100.6 °F
Answer:
(b) 98.6 °F
Question 8.
Which type of thermometer measures temperature without making contact with the human body?
(a) Digital thermometer
(b) Mercury thermometer
(c) Infrared thermometer
(d) Alcohol thermometer
Answer:
(c) Infrared thermometer
Question 9.
What is the typical range of a laboratory thermometer?
(a) -10 °C to 50 °C
(b) -10 °C to 100 °C
(c) -10 °C to 110 °C
(d) -10 °C to 150 °C
Answer:
(c) -10 °C to 110 °C
Question 10.
At what temperature does molecular motion theoretically cease?
(a) 0°C
(b) – 100 °C
(c) -273.15 °C
(d) – 500 °C
Answer:
(c) -273.15 °C
Question 11.
What was Anna Mani known for?
(a) Developing the Kelvin scale
(b) Creating the first digital thermometer
(c) Contributions to meteorology and weather instruments
(d) Discovering infrared thermometers
Answer:
(c) Contributions to meteorology and weather instruments
Question 12.
How should a laboratory thermometer be held when measuring temperature?
(a) Horizontally
(b) Vertically
(c) At a 45-degree angle
(d) Upside down
Answer:
(b) Vertically
Question 13.
What should be done to the digital thermometer before and after use?
(a) Boil it
(b) Clean it with alcohol
(c) Wash the tip with soap and water
(d) Freeze it
Answer:
(c) Wash the tip with soap and water
Question 14.
Which scale is primarily used for scientific temperature measurements?
(a) Celsius
(b) Fahrenheit
(c) Kelvin
(d) Both (a) and (b)
Answer:
(c) Kelvin
Question 15.
What is the freezing point of water on the Celsius scale?
(a)-273.15 °C
(b) 0 °C
(c) 32 °C
(d) 100 °C
Answer:
(b) 0 °C
Question 16.
What is the boiling point of water on the Fahrenheit scale?
(a) 100 °F;
(b) 180 °F
(c) 212 °F
(d) 373 °F
Answer:
(c) 212 °F
Question 17.
What should be avoided when handling a laboratory thermometer?
(a) Holding it by the bulb
(b) Immersing it in the substance
(c) Reading it at eye level
(d) Keeping it vertical
Answer:
(a) Holding it by the bulb
Question 18.
Which type of thermometer was used during the COVID-19 pandemic for non-contact measurement?
(a) Digital thermometer
(b) Mercury thermometer
(c) Infrared thermometer
(d) Alcohol thermometer
Answer:
(c) Infrared thermometer
Question 19.
Why is it important to measure temperature accurately in scientific experiments?
(a) To save time
(b) To ensure reproducibility and reliability of results
(c) To use expensive equipment
(d) To make experiments faster
Answer:
(b) To ensure reproducibility and reliability of results
Question 20.
Why are digital thermometers replacing mercury thermometers?
(a) They are cheaper
(b) They are easier to break
(c) They pose no risk of mercury exposure and are easier to read
(d) They are less accurate
Answer:
(c) They pose no risk of mercury exposure and are easier to read
2. Fill in the blanks with appropriate words :
1. The device that measures temperature is called a ____________
Answer:
Thermometer
2. Clinical thermometers generally use a scale called the ____________ scale.
Answer:
Celsius
3. The normal temperature of a healthy human body is taken to be ____________ °C.
Answer:
37
4. The liquid used in laboratory thermometers is generally alcohol or ____________
Answer:
Mercury
5. A digital clinical thermometer measures temperature using ____________ densors.
Answer:
Heat
6. Non-contact thermometers are also known as ____________ thermometers.
Answer:
Infrared
7. The unit of temperature in the Kelvin scale is ____________
Answer:
Kelvin
8. Mercury thermometers are being replaced by ____________ thermometers due to safety concerns.
Answer:
Digital
9. The temperature difference between the two bodies tells us how ____________ one body is in comparison to another.
Answer:
Hot
10. The Fahrenheit scale is not commonly used ____________ in ____________ studies.
Answer:
Scientific
11. The normal temperature of a human body in Fahrenheit is ____________ °F.
Answer:
98.6
12. Laboratory thermometers typically have a temperature range from -10°C to ____________°C.
Answer:
110
13. The lowest and the highest temperature a laboratory thermometer can measure is known as its ____________
Answer:
Range
14. The temperature of a body tells us how ____________ or ____________ cold it is.
Answer:
Hot
15. During the COVID-19 pandemic, special thermometers called ____________ were used to measure temperature from a distance.
Answer:
infrared
3. State whether the statements given below are True or False:
(i) Clinical thermometers are used for measuring the temperature of boiling water.
Answer:
False
(ii) Digital thermometers are safer than mercury thermometers because they do not contain toxic substances.
Answer:
True
(iii) The Kelvin scale is primarily used for everyday temperature measurements.
Answer:
False
(iv) The normal temperature of a healthy human body is 37.0 °C.
Answer:
True
(v) Infrared thermometers can measure temperature without making contact with the body.
Answer:
True
(vi) Laboratory thermometers typically have a temperature range from 0 °C to 100 °C.
Answer:
False
(vii) The Fahrenheit scale sets the freezing point of water at 0 °F.
Answer:
False
(viii) Anna Mani made significant contributions to the field of meteorology in India.
Answer:
True
(ix) Mercury thermometers are being replaced by digital thermometers due to ease of reading and safety concerns.
Answer:
True
(x) Absolute zero is the point where molecular’ motion ceases and is equivalent to -273.15 °C.
Answer:
True
4. Assertion-Reason Questions
For the following questions, two statements are given- one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to questions from the codes (a), (b), (c) and (d) as given below:
Question 1.
Assertion (A): Clinical thermometers are used for measuring the temperature of boiling water.
Reason (R): Clinical thermometers have a limited range suitable only for measuring human body temperature.
(a) Both A and R are true and R is correct explanation of the assertion,
(b) Both A and R are true but R is not the correct explanation of the assertion,
(c) A is true but R is false,
(d) A is false but R is true
Answer:
(d) A is false but R is true
Question 2.
Assertion (A): Digital thermometers are replacing mercury thermometers.
Reason (R): Mercury is a toxic substance, and digital thermometers provide easier-to- read displays.
(a) Both A and R are true and R is correct explanation of the assertion,
(b) Both A and R are true but R is not the correct explanation of the assertion,
(c) A is true but R is false,
(d) A is false but R is true
Answer:
(a) Both A and R are true and R is correct explanation of the assertion,
Question 3.
Assertion (A): Infrared thermometers were widely used during the COVID-19 pandemic.
Reason (R): Infrared thermometers can measure temperature without direct contact with the body.
(a) Both A and R are true and R is correct explanation of the assertion,
(b) Both A and R are true but R is not the correct explanation of the assertion,
(c) A is true but R is false,
(d) A is false but R is true
Answer:
(a) Both A and R are true and R is correct explanation of the assertion,
5. Match the following items given in Column A with that in Column B:
Question 1.
| Column A | Column B |
| (a) Clinical thermometer | (i) Measures temperature without contact |
| (b) Mercury | (ii) 98.6 °F |
| (c) Digital thermometer | (iii) -273.15 °C |
| (d) Normal body temperature in Celsius | (iv) Weather Woman of India |
| (e) Infrared thermometer | (v) Used to measure human body temperature |
| (f) 37°C in Fahrenheit scale equals | (vi) Highly toxic substance used in old thermometers |
| (g) Laboratory thermometer | (vii) Provides easy-to-read digital display |
| (h) Absolute zero | (viii) Typically has a range from -10 °C to 110 °C |
| (i) Anna Mani | (ix) 37.0 °C |
| (j) Heat sensors | (x) Used in digital thermometers |
Answer:
| Column A | Column B |
| (a) Clinical thermometer | (v) Used to measure human body temperature |
| (b) Mercury | (vi) Highly toxic substance used in old thermometers |
| (c) Digital thermometer | (vii) Provides easy-to-read digital display |
| (d) Normal body temperature in Celsius | (ix) 37.0 °C |
| (e) Infrared thermometer | (i) Measures temperature without contact |
| (f) 37°C in Fahrenheit scale equals | (ii) 98.6 °F |
| (g) Laboratory thermometer | (viii) Typically has a range from -10 °C to 110 °C |
| (h) Absolute zero | (iii) -273.15 °C |
| (i) Anna Mani | (iv) Weather Woman of India |
| (j) Heat sensors | (x) Used in digital thermometers |