Heat and Internal Energy
Physics ⇒ Heat and Thermodynamics
Heat and Internal Energy starts at 7 and continues till grade 12.
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See sample questions for grade 9
A metal rod is heated at one end. Which method of heat transfer is primarily responsible for the other end becoming hot?
Define internal energy.
Describe how heat is transferred from the Sun to the Earth.
Describe the difference between heat and temperature.
Describe what happens to the internal energy of ice as it melts at 0°C.
Explain why a swimming pool at 25°C contains more heat than a cup of tea at 90°C.
A 0.2 kg piece of metal at 80°C is placed in 0.5 kg of water at 20°C. The final temperature is 22°C. If the specific heat capacity of water is 4200 J/kg°C, calculate the heat gained by the water.
A 250 g sample of a metal at 100°C is placed in 100 g of water at 20°C. If the final temperature is 25°C, and the specific heat capacity of water is 4200 J/kg°C, calculate the heat lost by the metal.
Which of the following is a good insulator of heat?
(1) Silver
(2) Air
(3) Iron
(4) Copper
Which of the following is NOT a factor affecting the amount of heat absorbed by a substance?
(1) Mass
(2) Specific heat capacity
(3) Color
(4) Volume
Which of the following is NOT a method of heat transfer?
(1) Conduction
(2) Radiation
(3) Reflection
(4) Convection
Which of the following is NOT a property of heat?
(1) It flows from hot to cold
(2) It is a form of energy
(3) It can be stored in a body
(4) It can change the state of a substance
Fill in the blank: The amount of heat required to change the state of 1 kg of a substance without changing its temperature is called ________.
Fill in the blank: The energy stored in the random motion of particles in a substance is called ________ energy.
Fill in the blank: The process by which heat is transferred through direct contact of particles is called ________.
Fill in the blank: The SI unit of specific heat capacity is ________.
True or False: Heat can be transferred in a vacuum by conduction.
True or False: Heat transfer by conduction is faster in gases than in solids.
True or False: Internal energy of a substance increases when it is heated.
True or False: The higher the specific heat capacity of a substance, the more heat it can store for a given temperature rise.
