CLASS -VII REVISION WORKSHEET
Chapter 4: Heat
 Fill in the blanks 
: 1. ______________ is a device used for measuring temperature

. 2. The materials which allow heat to pass through them easily are __________ of heat.
 3. Clinical thermometer is used to measure our _____________
 4. Wool is poor __________________ of heat and it has air trapped in between the fibres.
 5. In ______________ generally the heat is transferred by conduction.
 6. _______________ metal is used in the bulb of the thermometer.
7. The normal temperature of the human body is __________

 True or False :
 1. The materials which do not allow heat to pass them easily are called insulators.
 2. In liquids and gases the heat is transferred by conduction.
3. A kink near the bulb of a clinical thermometer prevents mercury level from falling of its own
. 4. We get heat from the sun by radiation.
5. Digital thermometers contain mercury.

Define : 1. Temperature 3. Conduction 2. Radiation 4.Convection
 Name the following:
 1. The movement of cool air from land towards sea.
 2. Two conductors of heat
3. Two insulators of heat

 Distinguish between  Conductors and insulators.
  Clinical and laboratory thermometer

 Diagram  Clinical Thermometer Laboratory Thermometer.