Part: 1

Question 1.
Which one of the following is a reliable measure?
(a) Hotness
(b) Coldness
(c) Temperature
(d) None of these

Answer: (c) Temperature

Question 2.
Name the device which is used to measure the hotness or coldness of an object.
(a) Picometer
(b) Barometer
(c) Manometer
(d) Thermometer

Answer: (d) Thermometer

Question 3.
Which one is filled in the bulb of a thermometer?
(a) Mercury
(b) Lead
(c) Copper
(d) Silver

Answer: (a) Mercury

Question 4.
What is the normal temperature of a healthy person?
(a) 37°C
(b) 37°F
(c) 37 K
(d) None of these

Answer: (a) 37°C

Question 5.
Heat always flows
(a) from a colder object to a hotter object
(b) from a hotter object to a colder object
(c) in both the directions
(d) heat never flows from one object to other

Answer: (b) from a hotter object to a colder object

Part: 2

Question 6.
Conduction is the method of transfer of heat in
(a) liquids
(b) solids
(c) gases
(d) vacuum

Answer: (b) solids

Question 7.
Heat from the sun reaches to us by
(a) radiation
(b) conduction
(c) convection
(d) all of these

Answer: (a) radiation

Question 8.
A beggar wrapped himself with a few layers of newspaper on a cold winter night. This helped him to keep himself warm because:
(a) friction between the layers of newspaper produces heat.

(b) air trapped between the layers of newspaper is a bad conductor of heat.
(c) newspaper is a conductor of heat.
(d) newspaper is at a higher temperature than the temperature of the surroundiong.

Answer: (b) air trapped between the layers of newspaper is a bad conductor of heat.

Question 9.
A marble tile would feel cold as compared to a wooden tile on a winter morning, because the marble tile:
(a) is a better conductor of heat than the wooden tile.
(b) is polished while wooden tile is not polished.
(c) reflects more heat than wooden tile.
(d) is a poor conductor of heat than the wooden tile.

Answer: (a) is a better conductor of heat than the wooden tile.

Question 10.
Paheli and Boojho measured their body temperature. Paheli found her’s to be 98.6°F and Boojho recorded 37°C. Which of the following statement is true?
(a) Paheli has a higher body temperature than Boojho.

(b) Paheli has a lower body temperature than Boojho.
(c) Both have normal body temperature.
(d) Both are suffering from fever.

Answer: (c) Both have normal body temperature.