ICSE Worksheet for Chapter - 4 Heat Class 8

ICSE Worksheet for Chapter - 4 Heat Class 8

Worksheets For class 8

Find ICSE Worksheet for chapter-4 Heat class 8

1. CLASS-8
2. BOARD: ICSE
3. PHYSICS Worksheet - 4
4. TOPIC: Heat
5. For other ICSE Worksheet for class 8 Science check out main page of Physics Wallah.

SUMMARY

• Heat –form of energy, Units of heat, Quantity of heat, Effect of heat, Specific Heat capacity
• Conductors and insulators, Principle of calorimetry, Change of state, Latent heat

SECTION I – OBJECTIVE

1. The coolant used in machine is
   1. Alcohol
   2. Benzene
   3. Water
   4. Petrol
2. The specific heat capacity of water is
   1. 4250 J kg ^{-1 0} C ^-1
   2. 4200 J kg ^{-1 0} C ^-1
   3. 5000 J kg ^{-1 0} C ^-1
   4. 4050 J kg ^{-1 0} C ^-1
3. The amount of heat required to raise the temperature of a substance through 1 ⁰ C is called
   1. Thermal energy
   2. Calorie
   3. Heat capacity
   4. Specific heat capacity
4. During land breeze, there is fall of pressure over the surface of
   1. Land
   2. Water
   3. Air
   4. None of these
5. The temperature at which liquid gets converted into its vapour state is called as
   1. Melting point
   2. Boiling point
   3. Dew point
   4. Freezing point
6. Conversion of water into steam is an example of
   1. Evaporation
   2. Freezing
   3. Melting
   4. Vaporization
7. Evaporation takes place from
   1. Surface of liquid
   2. Throughout the liquid
   3. From the mid-portion of the liquid
   4. None of these
8. Boiling takes place from
   1. Surface of liquid
   2. Throughout the liquid
   3. From the mid-portion of the liquid
   4. None of these
9. The unit of specific latent heat is
   1. J kg ^-10 C ^-1
   2. J.kg /m
   3. J/kg
   4. None of these
10. Express 336000J in calories
    1. 6789
    2. 80000
    3. 10000
    4. None of these

SECTION II - SUBJECTIVE

1. Define the following:
   1. Specific heat capacity
   2. One kilocalorie
   3. Specific latent heat
2. 1500 cal of heat is supplied to 200g of water. Find the rise in temperature. Specific heat capacity of water is 1 cal g ^{-1 0} C ^-1
3. Calculate the specific latent heat of fusion of a solid if 20 g of it requires 8400 J of heat energy for melting.
4. What do you mean by the change state? Show the complete cycle of change of state.
5. Describe the process of condensation and sublimation with examples.
6. What are conductors and insulators? Give examples. Why do solids conduct heat better than liquids or gases?

Solutions: to worksheet-4 Topic- Heat

Objective Problems: