1.1.2 Understanding Energy Transfers

• What are energy transfers defined as?

  Movement of energy
• Match the type of energy transfer with its definition:

  Conduction ↔️ Energy transfer through direct contact

  Convection ↔️ Energy transfer by the movement of a fluid

  Radiation ↔️ Energy transfer through electromagnetic waves
• What type of medium is required for convection to occur?

  Fluid
• What do energy transfers enable in energy stores and systems?

  Transformations
• Order the following features to describe the differences between energy sources and destinations:

  1️⃣ Role: Supplies energy vs Receives energy

  2️⃣ Energy State: Typically high vs Typically low

  3️⃣ Location: Initial point of energy flow vs Final point of energy flow

  4️⃣ Purpose: To provide energy for a process vs To store or utilize the energy
• What is the energy source in a solar panel system?

  Sunlight
• In a solar panel system, the energy destination is the electrical grid
• Energy destinations typically have high energy states.

  False
• Convection involves the movement of a fluid
• Energy transfers refer to the movement of energy from one place or object to another
• Conduction involves the bulk movement of the medium.

  False
• What is the definition of conduction as a form of energy transfer?

  Direct contact
• Match the type of energy transfer with its characteristic:

  Conduction ↔️ No bulk movement

  Convection ↔️ Thermal energy carried by fluid

  Radiation ↔️ No medium required
• Convection transfers energy through the movement of a liquid or gas
• What is the primary purpose of an energy source in a system?

  To supply energy
• Kinetic energy is the energy of motion
• What form of energy is carried by electric currents and fields?

  Electrical energy
• Light energy is carried by electromagnetic radiation in the visible spectrum
• Order the following energy transformations in a system:

  1️⃣ Potential energy converts to kinetic energy

  2️⃣ Electrical energy converts to mechanical energy
• Understanding energy transformations is key to analyzing energy transfers in physical systems.


  True
• Which type of energy transfer does not require a medium?

  Radiation
• Batteries are examples of energy sources.


  True
• Potential energy is stored energy due to an object's motion.

  False
• How is sound energy transmitted?

  Vibrations
• What is an example of energy transfer through conduction?

  Heating a metal pan
• Potential energy can be transformed into kinetic energy.


  True
• What is the definition of conduction as an energy transfer mechanism?

  Energy transfer through direct contact
• Convection involves the movement of fluids
• What are energy transfers defined as?

  Movement of energy
• Conduction involves the bulk movement of the medium carrying energy.

  False
• What is an energy source in a system?

  Supplies energy
• What type of energy is associated with motion?

  Kinetic energy
• Potential energy is stored energy due to an object's position or state.

  True
• What type of energy is associated with the random motion of particles?

  Thermal energy
• The total amount of energy in a closed system remains constant
• What is light energy carried by?

  Electromagnetic radiation
• Sound energy is transmitted through vibrations
• Match the energy transfer mechanism with its characteristic:

  Conduction ↔️ Requires direct medium contact

  Convection ↔️ Carries thermal energy in fluids

  Radiation ↔️ No medium required
• What type of energy transfer does the sun use to heat Earth?

  Radiation
• Radiation does not require a medium