Understanding Phase Changes and Heat Transfer

What is the process called when a solid turns into a liquid?

• Melting

• Sublimation

• Condensation

• Freezing

Define the term 'temperature'.

• Temperature is a measure of the average kinetic energy of particles in a substance.

• Temperature is the total energy of all particles in a substance.

• Temperature is a measure of the density of particles in a substance.

• Temperature is the amount of heat in a substance.

What is the main method of heat transfer through liquids and gases?

• Conduction

• Insulation

• Convection

• Radiation

What happens to the molecules of a substance when it is heated?

• The molecules become solid and stop moving.

• The molecules shrink and become denser.

• The molecules lose energy and slow down.

• The molecules move faster and may change state.

What is the term for the change from liquid to gas?

• Sublimation

• Condensation

• Vaporization

• Freezing

How does heat transfer occur in solids?

• Heat transfer in solids occurs through convection.

• Heat transfer in solids occurs through conduction.

• Heat transfer in solids occurs through evaporation.

• Heat transfer in solids occurs through radiation.

What is the difference between hot and cold in terms of molecular motion?

• Cold molecules have more energy than hot molecules.

• Cold molecules vibrate more than hot molecules.

• Hot molecules move faster than cold molecules.

• Hot and cold molecules move at the same speed.

What is the process called when a gas turns into a liquid?

• Precipitation

• Condensation

• Evaporation

• Sublimation

What is thermal equilibrium?

• Thermal equilibrium is the state where one system is losing heat while another is gaining heat.

• Thermal equilibrium is the state in which two or more systems in thermal contact have no net heat exchange, indicating they are at the same temperature.

• Thermal equilibrium occurs when systems are at different temperatures.

• Thermal equilibrium is the process of heat transfer between two objects.

What is the significance of the boiling point of a substance?

• The boiling point indicates the temperature at which a substance changes from liquid to gas.

• The boiling point indicates the density of a substance.

• The boiling point determines the color of a substance.

• The boiling point is the temperature at which a substance freezes.