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Thermal Equilibrium Quiz

Quiz by Mr.MD Showket Hasan

Grade 7
Science
Thailand Core Curriculum

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20 questions
Show answers
  • Q1
    What does it mean for two objects to be in thermal equilibrium?
    They have the same mass.
    They are made of the same material.
    They have the same volume.
    They have the same temperature.
    30s
    SC7.SPS.1
  • Q2
    Which of the following is the primary mechanism of heat transfer that leads to thermal equilibrium?
    All of the above
    Radiation
    Conduction
    Convection
    30s
  • Q3
    Imagine you place a hot cup of coffee on a table in a room. Which of the following statements is true as the coffee cools down?
    The coffee only exchanges heat with the surrounding air.
    The coffee gains heat from the table and the surrounding air.
    The coffee loses heat until it reaches thermal equilibrium with the table and the surrounding air.
    The coffee only exchanges heat with the table.
    30s
  • Q4
    You place an ice cube in a glass of warm water. What happens to the temperature of the water as the ice melts?
    The water temperature remains the same.
    The water temperature fluctuates up and down.
    The water temperature decreases.
    The water temperature increases.
    30s
  • Q5
    Which of the following statements correctly describes the direction of heat flow?
    Heat flow depends on the volume of the objects.
    Heat flows from a hotter object to a colder object.
    Heat flow depends on the mass of the objects.
    Heat flows from a colder object to a hotter object.
    30s
  • Q6
    What principle governs the heat exchange between objects as they approach thermal equilibrium?
    Archimedes' principle
    Conservation of energy
    Newton's third law of motion
    Conservation of momentum
    30s
  • Q7
    If two objects made of different materials are in thermal equilibrium, do they necessarily have the same internal energy?
    Yes, they have the same internal energy.
    It depends on the masses of the objects.
    No, they may have different internal energies.
    It depends on the volumes of the objects.
    30s
  • Q8
    Which of the following household appliances relies on the principles of thermal equilibrium to function?
    Blender
    Refrigerator
    Toaster
    Washing machine
    30s
  • Q9
    Why does a metal spoon placed in a hot cup of tea become hot to the touch?
    The spoon generates its own heat.
    Heat is transferred to the spoon through convection.
    Heat is transferred to the spoon through conduction.
    Heat is transferred to the spoon through radiation.
    30s
  • Q10
    When ice melts, its temperature remains constant even though it is absorbing heat energy. Why?
    The absorbed heat energy is converted to light energy.
    The absorbed heat energy is lost to the surroundings.
    The absorbed heat energy is used to increase the kinetic energy of the water molecules.
    The absorbed heat energy is used to break the bonds between the water molecules in the ice.
    30s
  • Q11
    In Example 4.9 [5], why does the final temperature of the water decrease?
    The ice absorbs heat from the water to melt.
    The water undergoes a chemical reaction with the ice.
    The water loses heat to the surrounding environment.
    The ice releases heat as it melts.
    30s
  • Q12
    In Example 4.10 [7], what is the significance of the specific heat capacity of ice being 0.5 cal/g·°C?
    It determines the rate at which the ice melts.
    It determines the amount of heat required to raise the temperature of the ice by 1°C.
    It has no significance in this problem.
    It determines the amount of heat required to melt 1 g of ice.
    30s
  • Q13
    The latent heat of fusion for water is 80 cal/g [5]. What does this value represent?
    Both b) and c) are correct.
    The amount of heat required to melt 1 g of ice at 0°C.
    The amount of heat required to raise the temperature of 1 g of water by 80°C.
    The amount of heat released when 1 g of water freezes at 0°C.
    30s
  • Q14
    Why is it not recommended to put very hot items in the refrigerator?
    Both a) and b) are correct.
    It can cause the refrigerator to work harder, leading to inefficient cooling and potential damage to the cooling system.
    It can lead to uneven cooling inside the refrigerator, increasing the risk of food spoilage.
    It has no significant effect on the refrigerator's performance.
    30s
  • Q15
    How does insulation help maintain thermal equilibrium?
    By increasing the rate of heat transfer between objects.
    By preventing heat transfer between objects or systems at different temperatures.
    Insulation has no effect on thermal equilibrium.
    By converting heat energy into other forms of energy.
    30s

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