MCQ | NCERT Class 9 Science | Chapter 7: Temperature and its Measurement
Q1. What does temperature tell us about an object?
(a) How hot or cold the object is
(b) How heavy the object is
(c) How long the object is
(d) How much space the object occupies
Answer: (a) How hot or cold the object is
Q2. Which instrument is used to measure temperature?
(a) Ruler
(b) Thermometer
(c) Balance
(d) Measuring cylinder
Answer: (b) Thermometer
Q3. Which of the following is a unit commonly used to express temperature?
(a) Metre
(b) Kilogram
(c) Degree Celsius
(d) Litre
Answer: (c) Degree Celsius
Q4. The symbol for degree Celsius is
(a) °C
(b) °M
(c) °K
(d) °F only
Answer: (a) °C
Q5. Which thermometer is commonly used to measure the temperature of the human body?
(a) Clinical thermometer
(b) Laboratory thermometer
(c) Rain gauge
(d) Barometer
Answer: (a) Clinical thermometer
Q6. What is the normal temperature of a healthy human body approximately?
(a) 0 °C
(b) 37 °C
(c) 50 °C
(d) 100 °C
Answer: (b) 37 °C
Q7. Which thermometer is generally used to measure the temperature of substances in experiments?
(a) Clinical thermometer
(b) Laboratory thermometer
(c) Digital clock
(d) Compass
Answer: (b) Laboratory thermometer
Q8. Why should we not rely only on our sense of touch to compare temperatures?
(a) Our sense of touch may not give an accurate measurement
(b) Our hands cannot touch objects
(c) Touch always gives the same temperature
(d) Temperature cannot be measured
Answer: (a) Our sense of touch may not give an accurate measurement
Q9. What happens when an object is heated?
(a) Its temperature generally increases
(b) Its temperature always becomes zero
(c) It always freezes
(d) It always becomes smaller
Answer: (a) Its temperature generally increases
Q10. What happens when an object is cooled?
(a) Its temperature generally decreases
(b) Its temperature always increases
(c) It always starts boiling
(d) It always becomes hotter
Answer: (a) Its temperature generally decreases
Q11. Which of the following is hotter?
(a) Water at 20 °C
(b) Water at 40 °C
(c) Water at 10 °C
(d) Water at 5 °C
Answer: (b) Water at 40 °C
Q12. Which of the following has the lowest temperature?
(a) 25 °C
(b) 15 °C
(c) 5 °C
(d) 30 °C
Answer: (c) 5 °C
Q13. Which instrument is suitable for measuring the temperature of boiling water in a laboratory?
(a) Laboratory thermometer
(b) Clinical thermometer
(c) Ruler
(d) Measuring tape
Answer: (a) Laboratory thermometer
Q14. Why is a clinical thermometer not suitable for measuring the temperature of very hot objects?
(a) Its range is designed mainly for measuring body temperature
(b) It cannot measure any temperature
(c) It has no scale
(d) It measures length instead of temperature
Answer: (a) Its range is designed mainly for measuring body temperature
Q15. What is the purpose of the scale on a thermometer?
(a) To read the numerical value of temperature
(b) To measure the mass of an object
(c) To measure the length of an object
(d) To identify the colour of an object
Answer: (a) To read the numerical value of temperature
Q16. Which of the following temperatures represents a colder object?
(a) 5 °C
(b) 25 °C
(c) 40 °C
(d) 60 °C
Answer: (a) 5 °C
Q17. Which of the following temperatures represents a hotter object?
(a) 10 °C
(b) 20 °C
(c) 30 °C
(d) 50 °C
Answer: (d) 50 °C
Q18. Why should the thermometer be handled carefully?
(a) It can be damaged if handled improperly
(b) It cannot measure temperature
(c) It is made only for measuring length
(d) It always changes the temperature of an object
Answer: (a) It can be damaged if handled improperly
Q19. When reading a thermometer, the eye should be
(a) at the same level as the liquid level or indicator
(b) far above the thermometer
(c) below the thermometer
(d) closed
Answer: (a) at the same level as the liquid level or indicator
Q20. Which of the following is an example of measuring temperature in everyday life?
(a) Checking whether a person has fever
(b) Measuring the length of a table
(c) Measuring the mass of a bag
(d) Finding the distance between two cities
Answer: (a) Checking whether a person has fever
Q21. Which thermometer can display temperature directly on a digital screen?
(a) Digital thermometer
(b) Ruler
(c) Spring balance
(d) Measuring cylinder
Answer: (a) Digital thermometer
Q22. What is the main difference between temperature and heat?
(a) Temperature indicates how hot or cold something is, while heat is energy transferred due to a temperature difference
(b) Temperature and heat are exactly the same
(c) Temperature measures length
(d) Heat measures mass
Answer: (a) Temperature indicates how hot or cold something is, while heat is energy transferred due to a temperature difference
Q23. If two objects are at different temperatures and are placed in contact, heat generally flows
(a) from the colder object to the hotter object
(b) from the hotter object to the colder object
(c) only from left to right
(d) in no direction
Answer: (b) from the hotter object to the colder object
Q24. Which statement about temperature measurement is correct?
(a) A thermometer gives a numerical measure of temperature
(b) Touch always gives an exact temperature
(c) Temperature cannot be measured
(d) A ruler is used to measure temperature
Answer: (a) A thermometer gives a numerical measure of temperature
Q25. What is the main purpose of studying temperature and its measurement?
(a) To understand how hot or cold objects are and measure their temperature accurately
(b) To measure the length of objects
(c) To measure the mass of objects
(d) To determine the colour of objects
Answer: (a) To understand how hot or cold objects are and measure their temperature accurately
