Topic 3: Thermal Energy Retest

Front

What is convection?

Back

Convection is the transfer of thermal energy through the movement of fluids (liquids and gases). It occurs when warmer, less dense areas of a fluid rise, while cooler, denser areas sink.

Front

What happens to the kinetic energy of particles in cold objects?

Back

Cold objects have lower kinetic energy because the particles are moving around less.

Front

How does a lava lamp demonstrate convection?

Back

In a lava lamp, as the liquid heats up, it becomes less dense and rises. When it cools, it becomes denser and sinks back down, creating a continuous cycle.

Front

Why do objects with more mass have more thermal energy?

Back

Objects with more mass have more thermal energy because they contain more molecules that have energy in their bonds.

Front

How does thermal energy differ between hot and cold objects?

Back

Hot objects have more thermal energy than cold objects.

Front

What is conduction?

Back

Conduction is the transfer of thermal energy through direct contact between materials. It occurs when faster-moving particles collide with slower-moving particles, transferring energy.

Front

What is radiation?

Back

Radiation is the transfer of thermal energy through electromagnetic waves. It does not require a medium, so it can occur in a vacuum.

Front

What is the relationship between temperature and kinetic energy?

Back

Temperature is a measure of the average kinetic energy of the particles in a substance. Higher temperatures indicate higher average kinetic energy.

Front

What is thermal equilibrium?

Back

Thermal equilibrium is the state in which two objects in contact with each other reach the same temperature, resulting in no net heat transfer between them.

Front

What is the role of thermal energy in weather patterns?

Back

Thermal energy from the sun drives weather patterns by heating the Earth's surface, causing air to move and create wind, clouds, and precipitation.