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 8
A beaker of water is heated on a stove. Which method of heat transfer is mainly responsible for heating the water?
A metal block at 80°C is placed in water at 20°C. In which direction will heat flow?
A metal spoon is placed in a cup of hot tea. After a while, the spoon becomes warm. Which method of heat transfer is responsible?
Describe how heat is transferred in a metal rod when one end is heated.
A 200 g block of ice at 0°C is melted by adding 67,000 J of heat. (Latent heat of fusion of ice = 334 J/g) How much ice melts?
A 500 g block of copper is heated from 20°C to 70°C. (Specific heat capacity of copper = 0.39 J/g°C) Calculate the heat absorbed.
A beaker of water is heated on a stove. Which method of heat transfer is mainly responsible for heating the water?
A metal block at 80°C is placed in water at 20°C. In which direction will heat flow?
Which method of heat transfer does not require a medium? (1) Conduction (2) Convection (3) Radiation (4) All of the above
Which of the following is a unit of heat? (1) Joule (2) Kelvin (3) Meter (4) Ampere
Which of the following is NOT a method of heat transfer? (1) Conduction (2) Convection (3) Radiation (4) Reflection
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 (4) It can be measured in joules
Fill in the blank: The amount of heat required to change 1 kg of a substance from solid to liquid without changing its temperature is called _______.
Fill in the blank: The amount of heat required to raise the temperature of 1 gram of a substance by 1°C is called _______.
Fill in the blank: The energy required to change a solid into a liquid at its melting point is called _______.
Fill in the blank: The process by which heat is transferred through direct contact is called _______.
True or False: Heat always flows from a colder object to a hotter object.
True or False: Internal energy of a system depends only on its temperature.
True or False: The higher the temperature of an object, the greater its internal energy.
True or False: The internal energy of an ideal gas depends only on its temperature.
