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WorksheetsThermal Energy
Total questions: 12
Worksheet time: 10mins
Energy transferred from a higher temperature object to a lower temperature object is ___.
heat
kinetic energy
thermal energy
internal energy
Which is the sum of the kinetic and potential energies of an object?
Heat energy
Specific heat capacity
Thermal energy
Temperature
Two isolated objects, at different temperatures, are put in contact with each other. Which of the following is/are true when the system reaches thermal equilibrium?
I. The cool object gains the same amount of heat lost by the warm object.
II. Both objects will have the same final temperature
III. Both objects lose the same amount of heat
I ONLY
II ONLY
I AND II ONLY
I AND III ONLY
Which best describes temperature?
It is equal to the heat difference between two objects
It is proportional to the total energy in an object
It is proportional to the average kinetic energy of particles in an object
It is equal to an object’s specific heat capacity
Two beakers A & B contain water at a temperature of 40°C. A contains 100 g of water and B contains 250 g of water. Which of the following statements is true about them?
I. has less thermal energy than
II. Both A and B have the same thermal energy
III. The water molecules in both A and B have the same average kinetic energy
I ONLY
II ONLY
III ONLY
I AND III ONLY
Which thermal exchange process does not require a medium?
conduction
convection
radiation
evaporation
Which thermal exchange process carries thermal energy through boiling water as it heats on top of a stove?
Conduction
convection
radiation
evaporation
A solid bar is heated at one end. How is thermal energy transferred to the other end of the bar?
Heated molecules move along the bar, carrying energy to the other end
Heated molecules move along the bar, giving energy to others along the bar
Heated molecules stay completely still, but give energy to other molecules
Heated molecules vibrate more rapidly and pass energy to other molecules
Samples of four different materials at room temperature are heated from below and heat is transferred upwards. In which material is all of the heat transferred by the vibration of molecules?
air
mercury
rubber
water
When a piece of smoldering rope is held at the opening of the box in the diagram, smoke moves in the direction indicated below.
Convection
Radiation
Vibration of molecules
Movement of free electrons
The tubes inside solar heating panels use the Sun’s radiation to warm water. Why are the tubes painted black?
Black surfaces absorb radiation well
Black surfaces conduct heat well
Black surfaces emit radiation well
Black surfaces reflect radiation well
An electrical heater is placed in a beaker of cold oil, as shown. The heater is switched on. What happens to the liquid at X?
It becomes less dense and falls
it becomes less dense and rises up
It becomes more dense and falls
It becomes more dense and rises
