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Question 1:

Which of the following is an example of thermal energy?

A) A burning candle
B) A moving car
C) A stretched rubber band
D) A spinning top

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Explanation: The correct answer is A) A burning candle. Thermal energy is the energy associated with the motion of particles within an object. In this case, the burning candle releases thermal energy in the form of heat as a result of the chemical reactions occurring during combustion.

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Question 2:

What is heat?

A) The measure of an object's temperature
B) The total amount of thermal energy in an object
C) The transfer of thermal energy between objects
D) The conversion of thermal energy into mechanical energy

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Explanation: The correct answer is C) The transfer of thermal energy between objects. Heat is the transfer of thermal energy from one object or system to another due to a difference in temperature. It flows from hotter objects to cooler objects until thermal equilibrium is reached.

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Question 3:

Which of the following statements is true about thermal energy?

A) It is the same as heat
B) It depends on an object's temperature
C) It is a form of potential energy
D) It can only be transferred through conduction

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Explanation: The correct answer is B) It depends on an object's temperature. Thermal energy is the total energy possessed by the particles within an object, and it depends on the object's temperature. As the temperature increases, the thermal energy of the object increases.

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Question 4:

How does thermal energy transfer occur in a vacuum?

A) Through conduction
B) Through convection
C) Through radiation
D) It cannot transfer in a vacuum

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Explanation: The correct answer is C) Through radiation. Thermal energy transfer in a vacuum occurs through radiation. Radiation is the transfer of heat energy in the form of electromagnetic waves, which can travel through empty space.

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Question 5:

Which of the following is an example of heat transfer by convection?

A) Feeling the warmth of sunlight on your skin
B) Touching a hot stove
C) Holding an ice cube in your hand
D) Seeing the glow of a fire

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Explanation: The correct answer is A) Feeling the warmth of sunlight on your skin. Convection is the transfer of heat energy through the movement of fluids (liquids or gases). In this case, the sunlight warms the air around you, and this warm air rises and comes into contact with your skin, transferring heat through convection.