Temperature and its Measurement Class 6 Questions and Answers NCERT Solutions
Class 6 Science Chapter 7 Temperature and its Measurement Question Answer
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Question 1.
The normal temperature of a healthy human being is close to
(i) 98.6 °C
(ii) 37.0 °C
(iii) 32.0 °C
(iv) 27.0 °C
Answer:
(ii) 37.0 °C
Question 2.
37 °C is the same temperature as
(i) 97.4 °F
(ii) 97.6 °F
(iii) 98.4 °F
(iv) 98.6 °F
Answer:
(iv) 98.6° F
Question 3.
Fill in the blanks:
(i) The hotness or coldness of a system is determined by its _________
(ii) The temperature of ice-cold water cannot be measured by a _________ thermometer.
(iii) The unit of temperature is degree _________
Answer:
(i) temperature
(ii) clinical
(iii) Celsius
Question 4.
The range of a laboratory thermometer is usually .
(i) 10 °C to 100 °C
(ii) -10 °C to 110 °C
(iii) 32 °C to 45 °C
(iv) 35 °C to 42 °C
Answer:
(ii) -10 °C to 110 °C
Question 5.
Four students used a laboratory thermometer to measure the temperature of water as shown in Fig. 7 :
Who do you think followed the correct way for measuring temperature ?
(i) Student 1
(ii) Student 2
(iii) Student 3
(iv) Student 4
Answer:
(ii) Student 2.
Question 6.
Colour to show the red column on the drawings of thermometers as per the temperatures written below (Page 138)
Answer:
Question 7.
Observe the part of thermometer shown in Fig. 7.8 and answer the following questions:
(i) What type of thermometer is it?
(ii) What is the reading of the thermometer?
(iii) What is the smallest value that this thermometer can measure?
Answer:
(i) Laboratory thermometer
(ii) 26° C
(iii) 1° C
Question 8.
A laboratory thermometer is not used to measure our body temperature. Give a reason.
Answer:
A laboratory thermometer is not used to measure human body temperature for two reasons:
(i) The thermometer has to be kept inside our mouth while taking the reading of temperature. The eye for reading the temperature has to be directly in line with the level of the liquid in the thermometer. This becomes highly inconvenient to use a laboratory thermometer for measuring our body temperature. Clinical thermometer is removed from the mouth and brought directly in front of our eyes to take a reading.
(ii) The smallest value of reading required for body temperature is 0.1 °C. If small markings are made on a range (-10 to 110°C) of laboratory thermometer the thermometer will be too long to handle for measuring human body temperature.
Question 9.
Vaishnavi has not gone to school as she is ill. Her mother has kept a record of her body temperature for three days as shown. In table.
(i) What was Vaishnavi’s highest recorded temperature?
(ii) On which day and what time was. Vaishnavi’s highest temperature recorded?
(iii) On which day did Vaishnavi’s temperature return to normal?
Answer:
(i) 40.0°C
(ii) Day one. Time : 7 p.m.
(iii) Three day.
Question 10.
If you have to measure the temperature 22.5° C, which of the following three thermometers will you use (see the figure)? Explain.
Answer:
Thermometer (b) can be used to measure the temperature 22.5° C appropriately. The least temperature that can be measured by using thermometer (b) is 0.5° C. While for (a) and (c), it is 1° C and 2° C respectively. Therefore, to measure a temperature having 0.5° C of preciseness, thermometer (b) is appropriate.
Question 11.
The temperature shown by the thermometer in Fig. 11. is:
(i) 28.0°C
(ii) 27.5°C
(iii) 26.5°C
(iv) 25.3°C
Answer:
(ii) 27.5°C
Question 12.
A laboratory thermometer has 50 divisions between 0°C and 100°C. What does each division of this thermometer measure?
Answer:
2°C
Question 13.
Draw the scale of a thermometer in which the smallest division reads 0.5°C. You may draw only the portion between 10°C and 20°C.
Answer:
Question 14.
Someone tells you that she has a fever of 101 degrees. Does she mean it on the Celsius scale or Fahrenheit scale?
Answer:
She is mentioning about the Fahrenheit scale. Because in Fahrenheit scale, the normal human body temperature is measured to be 98.6° F and if the body temperature increases by 2-3 degrees from this value, then the person is said to be suffering from fever.