Thermal Energy Savaas Experience 2

What three methods of thermal energy transfer are introduced?

• Reflection, refraction, conduction

• Conduction, convection, and radiation

• Expansion, contraction, and insulation

• Melting, freezing, and evaporation

How is energy transferred during conduction?

• Through collisions of atoms

• Through moving air

• By sound waves

• By radiation from the sun

In which materials is conduction most important?

• Solids and liquids

• Gases and plasmas

• Only gases

• Only liquids

What object in the video conducts heat from the fire to the water?

• Wooden spoon

• Metal kettle

• Plastic cup

• Ceramic plate

Why does metal heat up quickly?

• The atoms are far apart

• The atoms vibrate and bump into each other

• The metal absorbs light

• It reflects heat back to the fire

What is convection?

• The transfer of energy by vibrating atoms

• The transfer of energy through movement of particles in a fluid

• The transfer of energy by electromagnetic waves

• The stopping of heat transfer

What is the movement of fluid called in convection?

• Density flow

• Convection current

• Heat pulse

• Radiation loop

Convection currents can occur in:

• Solids only

• Gases, liquids, and plasmas

• Metals only

• Rocks only

What causes a convection current to form in boiling water?

• The water freezes at the bottom

• Warm water rises because it is less dense

• Cool water rises because it is lighter

• The air above pushes the water

What is radiation?

• The transfer of heat through waves

• The movement of fluids

• The vibration of atoms

• The movement of electrons