Unit 3 Heat Transfer Study Guide

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases). Warm air or liquid rises, while cooler air or liquid sinks, creating a circulation pattern.

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials. Heat moves from the hotter object to the cooler one.

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves, such as light. It does not require a medium to travel through.

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or state. For example, a roller coaster at the top of a hill has potential energy.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of motion. The faster an object moves, the more kinetic energy it has.

Front

How does temperature affect the movement of molecules in a substance?

Back

As temperature increases, molecules move faster. In hot water, molecules move more quickly than in cold water.

Front

What happens to the energy of food when it is consumed?

Back

The chemical energy in food is transformed into mechanical energy for movement, thermal energy for body heat, and sound energy when we speak.

Front

What is the principle of conservation of energy?

Back

The principle of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

What is an example of convection in everyday life?

Back

An example of convection is when warm air from a heater rises to the ceiling, while cooler air sinks to the floor.

Front

What is the relationship between potential energy and kinetic energy in a roller coaster?

Back

As a roller coaster climbs, potential energy increases. As it descends, potential energy is converted into kinetic energy, increasing its speed.