Worksheet 1
ICSE Class 7 Heat and Temperature
Section A: Fill in the Blanks
The SI unit of temperature is _______________.
Heat always flows from a _______________ body to a _______________ body.
_______________ is the process of heat transfer in solids.
The boiling point of water is _______________ °C at sea level.
_______________ is the transfer of heat through liquids and gases.
The freezing point of water in Kelvin is _______________.
_______________ is the measurement of the average kinetic energy of the particles in a substance.
A device used to measure temperature is called a _______________.
Section B: True or False
Heat and temperature are the same. ( )
Metals are good conductors of heat. ( )
The process of convection occurs in solids. ( )
The sun's heat reaches the Earth through conduction. ( )
Dark surfaces absorb more heat compared to light surfaces. ( )
Section C: Multiple Choice Questions
Which of the following is the best conductor of heat? a) Wood b) Plastic c) Copper d) Glass
The normal body temperature of a human in Celsius is: a) 98.6 b) 37 c) 100 d) 212
Which of the following is a bad conductor of heat? a) Iron b) Rubber c) Aluminum d) Silver
What is the primary mode of heat transfer in a vacuum? a) Conduction b) Convection c) Radiation d) None of the above
The instrument used to measure the temperature of the human body is: a) Barometer b) Hygrometer c) Clinical Thermometer d) Laboratory Thermometer
Section D: Short Answer Questions
Define heat and temperature. How are they different?
Explain the three modes of heat transfer with examples.
Why are cooking utensils made of metals while their handles are made of plastic or wood?
Describe the construction and working of a clinical thermometer.
Section E: Diagram-Based Questions
Draw a neat and labeled diagram to show the process of convection in liquids.
Show how heat transfer occurs through conduction in a metal rod.
Section F: Numerical Problems
A 2 kg block of metal is heated, and its temperature rises from 30°C to 80°C. If the specific heat capacity of the metal is 400 J/kg·°C, calculate the amount of heat absorbed by the metal.
Convert the following temperatures: a) 25°C to Kelvin b) 373 K to Celsius c) 98.6°F to Celsius
Section G: Activity-Based Question
Design an experiment to demonstrate that black surfaces absorb more heat than white surfaces. Write the materials required, procedure, and observation.
Section A: Fill in the Blanks
The device used to measure very high temperatures is called a _______________.
The transfer of heat without any medium is known as _______________.
The specific heat capacity is defined as the amount of heat required to raise the temperature of _______________ of a substance by 1°C.
The SI unit of heat energy is _______________.
The normal human body temperature in Kelvin is _______________.
Liquids expand when they are _______________.
The process of heat transfer in gases is called _______________.
_______________ surfaces are better reflectors of heat.
Section B: Match the Following
| Column A | Column B |
|---|---|
| 1. Conduction | a) Black surface |
| 2. Convection | b) Transfer through fluids |
| 3. Radiation | c) Transfer through solids |
| 4. Good absorber of heat | d) No medium required |
| 5. Bad conductor of heat | e) Wood |
Section C: Multiple Choice Questions
The unit of specific heat capacity is: a) J/kg b) J/kg·K c) J/K d) kg·J
Which one of the following is not a mode of heat transfer? a) Conduction b) Convection c) Insulation d) Radiation
In a thermometer, the liquid commonly used is: a) Mercury b) Water c) Alcohol d) Both a and c
Heat is measured in: a) Joules b) Kelvin c) Degrees Celsius d) Pascals
Which of the following materials is a good insulator? a) Copper b) Plastic c) Iron d) Aluminum
Section D: Short Answer Questions
Why does the bottom of a cooking pan often have a black coating?
Differentiate between good conductors and bad conductors of heat with examples.
What is the role of vacuum in a thermos flask? Explain.
Describe how land and sea breezes occur due to convection.
Section E: Diagram-Based Questions
Draw a diagram of a thermos flask and explain its working principle.
Illustrate and explain the process of radiation using an example.
Section F: Numerical Problems
Calculate the heat required to raise the temperature of 5 kg of water from 20°C to 100°C. The specific heat capacity of water is 4200 J/kg·°C.
If a metal rod of 500 g is heated from 25°C to 75°C and absorbs 10,000 J of heat, calculate its specific heat capacity.
Section G: Experiment-Based Question
Plan an activity to demonstrate the phenomenon of conduction in metals. Write the materials required, procedure, and observation.
Bonus Question
Explain why it feels colder to touch a metal object than a wooden object at the same temperature.
