Energy Transfer: Unit 6 Test

Which of the following is an example of thermal energy transfer through conduction?

• A pot heating on a stove

• Warm air rising to the ceiling

• Sunlight warming the ground

• A microwave heating food

How does thermal energy transfer in a convection current?

• From cooler areas to warmer areas

• In a circular pattern due to density differences

• Through direct contact between particles

• By electromagnetic waves

Which scenario best illustrates the concept of thermal equilibrium?

• A hot cup of coffee cooling down to room temperature

• Ice melting in a glass of water

• A metal rod being heated at one end

• A refrigerator cooling food

What happens to the kinetic energy of particles as the temperature of a substance increases?

• It decreases

• It remains constant

• It increases

• It fluctuates randomly

Explain why a metal spoon feels colder than a wooden spoon at room temperature.

• Metal conducts heat away from your hand faster than wood

• Metal has a lower density than wood

• Wood absorbs more heat from the environment

• Metal reflects more light than wood

Predict what will happen to the temperature of two substances in contact over time.

• The warmer substance will become warmer

• The cooler substance will become cooler

• Both substances will reach the same temperature

• The temperatures will remain unchanged

Which method of heat transfer is primarily responsible for the warmth felt from a campfire?

• Conduction

• Convection

• Radiation

• Insulation

How does the kinetic energy of particles relate to the state of matter of a substance?

• Higher kinetic energy is associated with solids

• Lower kinetic energy is associated with gases

• Higher kinetic energy is associated with gases

• Kinetic energy does not affect the state of matter

Describe the process of convection in the atmosphere.

• Warm air rises and cool air sinks, creating a cycle

• Heat is transferred through direct contact

• Heat is transferred by electromagnetic waves

• Air particles remain stationary

What is the relationship between temperature and the speed of particles in a gas?

• As temperature increases, particle speed decreases

• As temperature decreases, particle speed increases

• As temperature increases, particle speed increases

• Temperature does not affect particle speed