NCERT Class VII Science Solutions: Chapter 4 – Heat Part 1

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Multiple Choice Questions

Question 1:

A marble tile would feel cold as compared to a wooden tile on a winter morning, because the marble tile

  1. Is a better conductor of heat than the wooden tile.

  2. Is polished while wooden tile is not polished.

  3. Reflects more heat than wooden tile.

  4. Is a poor conductor of heat than the wooden tile.

Answer: A

Image of Marble tile and Wooden Tile

Image of Marble Tile and Wooden Tile

Image of Marble tile and Wooden Tile

Question 2:

A beggar wrapped himself with a few layers of newspaper on a cold winter night. This helped him to keep himself warm because

  1. Friction between the layers of newspaper produces heat.

  2. Air trapped between the layers of newspaper is a bad conductor of heat.

  3. Newspaper is a conductor of heat.

  4. Newspaper is at a higher temperature than the temperature of the surrounding.

Answer: B

Question 3:

Paheli and Boojho measured their body temperature. Paheli found her’s to be and Boojho recorded . Which of the following statement is true?

  1. Paheli has a higher body temperature than Boojho.

  2. Paheli has a lower body temperature than Boojho.

  3. Both have normal body temperature.

  4. Both are suffering from fever.

Answer: C

Question 4:

Boojho has three thermometers as shown in Figure. He wants to measure the temperature of his body and that of boiling water. Which thermometer (s) should he choose?

As showing in images is a thermometers

Thermometers

As showing in images is a thermometers

  1. Thermometer (i) or (iii) for measuring body temperature and (ii) for measuring the temperature of boiling water.

  2. Thermometer (i) for measuring temperature of both.

  3. Thermometer (ii) for measuring temperature of both.

  4. Thermometer (iii) for measuring temperature of both.

Answer: A