Available Answers

1. 1.

   Tick (√ ) the correct options:

   1. Temperature of an object is measured with ____________.
      1. barometer
      2. lactometer
      3. thermometer
      4. electrometer
   2. The range of laboratory thermometer is from -10 °C to ___________.
      1. 90 °C
      2. 100 °C
      3. 110 °C
      4. 120 °C
2. 2.

   1. Conduction of heat takes place only in _______________.
      1. solids
      2. liquids
      3. gases
      4. air
   2. _____________ is a bad conductor of heat.
      1. Copper
      2. Air
      3. Silver
      4. Gold
3. 3.

   Tick (√ ) the correct options:

   1. Liquids transfer heat by ___________.
      1. conduction
      2. convection
      3. radiation
      4. expansion
   2. The mode of heat transfer that does not require a medium is ___________.
      1. conduction
      2. convection
      3. radiation
      4. all of these
   3. When one end of a metal rod is heated, the other end of the rod gets heated by __________.
      1. conduction
      2. convection
      3. radiation
      4. reflection
   4. The slight bend in the stem just above the bulb in the clinical thermometer is called _________.
      1. ray
      2. jerk
      3. kink
      4. contraction
   5. The normal temperature of a healthy human body is ____________.
      1. 30 °C
      2. 35 °C
      3. 40 °C
      4. 37 °C
   6. 0 ^oC is the same temperature as ______________.
      1. 0 °F
      2. 212 °F
      3. 32 °F
      4. 100 °F
   7. On dipping a plastic and a steel spoon in hot water, _____________ spoon gets hot.
      1. plastic
      2. steel
      3. both of these
      4. none of these
   8. The sensation of hotness and coldness is caused by _____________ energy.
      1. magnetic
      2. electrical
      3. heat
      4. mechanical
   9. Cooking utensils are usually made up of _____________.
      1. wood 
      2. plastic
      3. stainless steel
      4. glass
   10. Handles of cooking utensils should be made of materials that are ____________.
       1. conductors
       2. insulators
       3. radiators
       4. absorbers
4. 4.

   Fill in the blanks:

   1. _____________ thermometer is used to measure our body temperature.
   2. All ____________ are good conductor of heat.
   3. _____________ thermometers do not use mercury.
   4. Shiny and ______________ surfaces are better reflectors.
   5. The lower fixed point is _____________  °C in a clinical thermometer.
   6. Heat is measured in _____________.
   7. Heat causes ______________.
   8. The SI unit of heat is _____________.
   9. The SI unit of temperature is _______________.
   10. Thermometer works on the principle of ______________ of liquids on heating.
   11. _____________ is a form of energy that causes the sensation of 'hotness' and 'coldness'.
5. 5.

   What is meant by temperature?
6. 6.

   How does the heat from the Sun reach the earth?