Thermometers

Q.

Draw the clinical thermometer and label its parts.

Q.

Two mercury thermometers are constructed such that one has a spherical bulb and the other an elongated cylindrical bulb of same volume. Which will respond quickly to temperature changes?

1. Spherical bulb.

2. Elongated cylindrical bulb.

3. Both will respond equally.

4. It is independent of the shape of the bulb.

Q. What are the precautions we need to take while using a clinical thermometer?

1. Do not hold the thermometer by the bulb.
2. Level of mercury should be along the line of sight.
3. Mercury level should not go below ${35}^{0}C$.
4. Do not wash the thermometer regularly.

Q.

Question 3 (c)
Fill in the blanks :
(c) Temperature is measured in degree ___.

Q. In a thermometer, there are $100$ major divisions between the freezing point and the boiling point of water. If each major division has $5$ minor divisions, what is the minimum reading that can be taken using the thermometer?

1. $0.2{}^{\circ }C$
2. $1.2{}^{\circ }C$
3. $0.8{}^{\circ }C$
4. $1{}^{\circ }C$

Q.

A clinical thermometer is used to measure the temperature of the human body.

1. True
2. False

Q. Which of the following statements is incorrect?

1. Laboratory thermometers do not have a kink in them.
2. Clinical thermometers can measure boiling point of water.
3. The range of clinical thermometers is ${35}^{\circ }C-{42}^{\circ }C$.
4. The mercury expands with an increase in temperature.

Q.

How does the Six's Maximum and Minimum Thermometer help in measuring temperature accurately?

Q.

What are the various types of thermometer? When do we use a maximum-minimum thermometer? [2 MARKS]

Q. While measuring the temperature of a pot of water while heating, the markings on the laboratory thermometer were erased. After a certain time of heating, the mercury level is observed to be constant. What could have been the reading on the thermometer?

1. $120°C$
2. $100°C$
3. $-70°C$
4. $0°C$

Q.

When the laboratory thermometer is taken out of boiling water and the reading is taken after 5 minutes, it will show ${100}^{\circ }C$.

Say True or False.

1. False

2. True

Q. ____ is the device used to measure temperature.

1. Manometer
2. Thermometer
3. Ammeter
4. Stethoscope

Q. How is the temperature read in the clinical thermometer?

Q. Choose whether true or false:-
Same type of thermometer is used everywhere.

1. True
2. False

Q.

The main advantage of mercury thermometer over alcohol thermometer is that mercury has greater boiling point than alcohol.

1. False

2. True

Q.

Which metal is used in thermometers?

1. Sodium

2. Mercury

3. Magnesium

4. Silver

Q. The liquid used in a clinical thermometer is .

1. bromine
2. water
3. mercury

Q. On a thermometer, which measures temperature in degree celsius, there are 10 small divisions between $1{}^{\circ }C$ and $2{}^{\circ }C$. Each small division will be equal to _____.

1. ${0.5}^{\circ }C$
2. ${0.4}^{\circ }C$
3. ${0.1}^{\circ }C$
4. ${0.2}^{\circ }C$

Q. Thermometer is an instrument used to measure the ________ a body.

1. heat contained in
2. heat released by
3. temperature of
4. expansion in

Q. One should read a thermometer by keeping the level of its mercury along one's line of sight, in order to avoid ________.

1. any damage to eyes
2. reading a wrong value
3. any leakage of mercury
4. the fall of the mercury level