Thermal and Kinetic Energy

What is convection?

• The transfer of thermal energy through the movement of fluids caused by differences in temperature.

• The process of heat transfer through direct contact between materials.

• The movement of air caused by the rotation of the Earth.

• The transfer of energy through electromagnetic waves.

What is thermal energy?

• Thermal energy is the total kinetic energy of all the particles in a substance, which is related to its temperature.

• Thermal energy is the energy stored in the bonds of chemical compounds.

• Thermal energy is the energy associated with the motion of an object in a gravitational field.

• Thermal energy is the energy released during nuclear reactions.

What happens to the kinetic energy of molecules when they cool down?

• The kinetic energy increases and molecules move faster.

• The kinetic energy remains the same and molecules move at a constant speed.

• The kinetic energy decreases and they move slower.

• The kinetic energy fluctuates randomly without affecting their speed.

What is the principle of thermal equilibrium?

• A state where two objects in contact exchange thermal energy.

• A state where two objects in contact do not exchange thermal energy, meaning they are at the same temperature.

• A condition where thermal energy is always transferred from a cooler object to a warmer object.

• A situation where objects are at different temperatures but do not exchange energy.

What happens to the temperature of a substance when it absorbs thermal energy?

• The temperature of the substance decreases.

• The temperature of the substance remains the same.

• The temperature of the substance increases.

• The temperature of the substance fluctuates.

What is the relationship between the speed of molecules and temperature?

• The speed of molecules decreases with temperature; slower molecules correspond to higher temperatures.

• The speed of molecules remains constant regardless of temperature changes.

• The speed of molecules increases with temperature; faster molecules correspond to higher temperatures.

• The speed of molecules is unrelated to temperature.

What is an example of convection?

• An example of convection is warm air rising and cool air sinking in a room.

• An example of convection is ice melting in a glass of water.

• An example of convection is a metal spoon getting hot in a pot of boiling water.

• An example of convection is sunlight warming the ground on a sunny day.

What is radiation?

• Radiation is the transfer of thermal energy through electromagnetic waves, such as heat from the sun.

• Radiation is the process of converting light into sound energy.

• Radiation is the movement of particles in a solid state.

• Radiation is the chemical reaction that occurs in living organisms.

What is conduction?

• Conduction is the transfer of thermal energy through direct contact between materials.

• Conduction is the movement of energy through waves in a vacuum.

• Conduction is the process of converting thermal energy into mechanical energy.

• Conduction is the transfer of energy through the movement of fluids.

What is an example of radiation?

• Feeling the warmth of the sun on your skin.

• Hearing a sound from a distance.

• Seeing a rainbow after rain.

• Tasting a sweet fruit.