Differentiate Conduction Convection and Radiation - Physics
Card 1 of 30
Identify the main heat transfer mechanism by which the Sun warms Earth.
Identify the main heat transfer mechanism by which the Sun warms Earth.
Tap to reveal answer
Radiation. Solar energy travels 93 million miles through the vacuum of space.
Radiation. Solar energy travels 93 million miles through the vacuum of space.
← Didn't Know|Knew It →
Identify the main heat transfer mechanism that makes warm air rise above a radiator.
Identify the main heat transfer mechanism that makes warm air rise above a radiator.
Tap to reveal answer
Convection. Heated air expands, becomes less dense, and rises in a convection current.
Convection. Heated air expands, becomes less dense, and rises in a convection current.
← Didn't Know|Knew It →
Identify the main heat transfer mechanism through a metal spoon in hot soup.
Identify the main heat transfer mechanism through a metal spoon in hot soup.
Tap to reveal answer
Conduction. Metal atoms vibrate and transfer energy through the solid spoon.
Conduction. Metal atoms vibrate and transfer energy through the solid spoon.
← Didn't Know|Knew It →
Which heat transfer method can occur through a vacuum?
Which heat transfer method can occur through a vacuum?
Tap to reveal answer
Radiation. EM waves don't need matter to propagate, unlike conduction and convection.
Radiation. EM waves don't need matter to propagate, unlike conduction and convection.
← Didn't Know|Knew It →
Which heat transfer method requires a moving fluid to carry energy?
Which heat transfer method requires a moving fluid to carry energy?
Tap to reveal answer
Convection. Density differences drive fluid circulation that carries thermal energy.
Convection. Density differences drive fluid circulation that carries thermal energy.
← Didn't Know|Knew It →
What is radiation as a mechanism of heat transfer?
What is radiation as a mechanism of heat transfer?
Tap to reveal answer
Heat transfer by electromagnetic waves (no medium required). Energy travels as EM waves, even through empty space.
Heat transfer by electromagnetic waves (no medium required). Energy travels as EM waves, even through empty space.
← Didn't Know|Knew It →
Which heat transfer method requires direct contact between particles?
Which heat transfer method requires direct contact between particles?
Tap to reveal answer
Conduction. Vibrating particles transfer energy to adjacent particles through collisions.
Conduction. Vibrating particles transfer energy to adjacent particles through collisions.
← Didn't Know|Knew It →
Identify the heat transfer method reduced by fitting a lid to a pot of hot water.
Identify the heat transfer method reduced by fitting a lid to a pot of hot water.
Tap to reveal answer
Convection. Lids prevent rising hot vapor from escaping, blocking convection currents.
Convection. Lids prevent rising hot vapor from escaping, blocking convection currents.
← Didn't Know|Knew It →
What is thermal radiation?
What is thermal radiation?
Tap to reveal answer
Heat transfer by electromagnetic waves (no medium required). Energy travels as infrared and other EM waves through space.
Heat transfer by electromagnetic waves (no medium required). Energy travels as infrared and other EM waves through space.
← Didn't Know|Knew It →
What is thermal convection?
What is thermal convection?
Tap to reveal answer
Heat transfer by bulk motion of a fluid (liquid or gas). Warmer fluid rises while cooler fluid sinks, creating circulation.
Heat transfer by bulk motion of a fluid (liquid or gas). Warmer fluid rises while cooler fluid sinks, creating circulation.
← Didn't Know|Knew It →
What is thermal conduction?
What is thermal conduction?
Tap to reveal answer
Heat transfer through direct particle contact in a material. Energy moves through vibrations passed between neighboring particles.
Heat transfer through direct particle contact in a material. Energy moves through vibrations passed between neighboring particles.
← Didn't Know|Knew It →
Identify the heat transfer method reduced by a shiny foil surface behind a radiator.
Identify the heat transfer method reduced by a shiny foil surface behind a radiator.
Tap to reveal answer
Radiation. Reflective surfaces redirect infrared waves back toward the heat source.
Radiation. Reflective surfaces redirect infrared waves back toward the heat source.
← Didn't Know|Knew It →
Identify the heat transfer method reduced by adding insulation like fiberglass to a wall.
Identify the heat transfer method reduced by adding insulation like fiberglass to a wall.
Tap to reveal answer
Conduction. Insulation creates air pockets that slow particle-to-particle heat transfer.
Conduction. Insulation creates air pockets that slow particle-to-particle heat transfer.
← Didn't Know|Knew It →
Which heat transfer method involves infrared energy as a common form?
Which heat transfer method involves infrared energy as a common form?
Tap to reveal answer
Radiation. Most thermal radiation occurs in the infrared portion of the EM spectrum.
Radiation. Most thermal radiation occurs in the infrared portion of the EM spectrum.
← Didn't Know|Knew It →
Which state(s) of matter can convection occur in under normal conditions?
Which state(s) of matter can convection occur in under normal conditions?
Tap to reveal answer
Fluids only: liquids and gases. Particles must flow freely; solids lack the mobility for bulk motion.
Fluids only: liquids and gases. Particles must flow freely; solids lack the mobility for bulk motion.
← Didn't Know|Knew It →
What type of heat transfer dominates when you feel heat from a fire without touching it?
What type of heat transfer dominates when you feel heat from a fire without touching it?
Tap to reveal answer
Radiation. Infrared waves from the fire travel through air to warm your skin.
Radiation. Infrared waves from the fire travel through air to warm your skin.
← Didn't Know|Knew It →
What type of heat transfer dominates in boiling water as hotter water rises and cooler sinks?
What type of heat transfer dominates in boiling water as hotter water rises and cooler sinks?
Tap to reveal answer
Convection. Density-driven currents form as hot water rises and cool water descends.
Convection. Density-driven currents form as hot water rises and cool water descends.
← Didn't Know|Knew It →
What type of heat transfer dominates within a solid metal bar heated at one end?
What type of heat transfer dominates within a solid metal bar heated at one end?
Tap to reveal answer
Conduction. Atoms in solids vibrate in place, passing energy along the bar.
Conduction. Atoms in solids vibrate in place, passing energy along the bar.
← Didn't Know|Knew It →
Which option best describes radiation: A) requires contact B) EM waves C) only in liquids?
Which option best describes radiation: A) requires contact B) EM waves C) only in liquids?
Tap to reveal answer
B) EM waves. Thermal radiation consists of electromagnetic waves, mainly infrared.
B) EM waves. Thermal radiation consists of electromagnetic waves, mainly infrared.
← Didn't Know|Knew It →
Which option best describes convection: A) fluid circulation B) vacuum only C) electron drift?
Which option best describes convection: A) fluid circulation B) vacuum only C) electron drift?
Tap to reveal answer
A) fluid circulation. Moving fluids transport thermal energy from hot to cold regions.
A) fluid circulation. Moving fluids transport thermal energy from hot to cold regions.
← Didn't Know|Knew It →
Which option best describes conduction: A) waves B) fluid flow C) particle collisions?
Which option best describes conduction: A) waves B) fluid flow C) particle collisions?
Tap to reveal answer
C) particle collisions. Conduction transfers heat via direct molecular collisions in solids.
C) particle collisions. Conduction transfers heat via direct molecular collisions in solids.
← Didn't Know|Knew It →
Which option best describes convection: particle collisions, fluid currents, or EM waves?
Which option best describes convection: particle collisions, fluid currents, or EM waves?
Tap to reveal answer
Fluid currents (bulk motion of a fluid). Mass movement of heated fluid transfers energy.
Fluid currents (bulk motion of a fluid). Mass movement of heated fluid transfers energy.
← Didn't Know|Knew It →
Identify the dominant heat transfer method: a metal spoon handle becomes hot in hot soup.
Identify the dominant heat transfer method: a metal spoon handle becomes hot in hot soup.
Tap to reveal answer
Conduction. Heat travels through direct contact along the metal.
Conduction. Heat travels through direct contact along the metal.
← Didn't Know|Knew It →
Identify the dominant heat transfer method: warm air rises and cool air sinks in a room.
Identify the dominant heat transfer method: warm air rises and cool air sinks in a room.
Tap to reveal answer
Convection. Density differences drive circulation currents.
Convection. Density differences drive circulation currents.
← Didn't Know|Knew It →
Identify the dominant heat transfer method: feeling warmth from the Sun on your skin.
Identify the dominant heat transfer method: feeling warmth from the Sun on your skin.
Tap to reveal answer
Radiation. Solar energy reaches Earth through empty space.
Radiation. Solar energy reaches Earth through empty space.
← Didn't Know|Knew It →
Identify the dominant heat transfer method: a pot of water circulates as it is heated from below.
Identify the dominant heat transfer method: a pot of water circulates as it is heated from below.
Tap to reveal answer
Convection. Heated water rises, cool water sinks, creating flow.
Convection. Heated water rises, cool water sinks, creating flow.
← Didn't Know|Knew It →
Identify the dominant heat transfer method: heat passes through a brick wall from a hot room to a cold room.
Identify the dominant heat transfer method: heat passes through a brick wall from a hot room to a cold room.
Tap to reveal answer
Conduction. Heat flows through solid material by molecular vibration.
Conduction. Heat flows through solid material by molecular vibration.
← Didn't Know|Knew It →
Identify the dominant heat transfer method: a campfire warms your face even when the air is cold.
Identify the dominant heat transfer method: a campfire warms your face even when the air is cold.
Tap to reveal answer
Radiation. Infrared waves travel directly from fire to face.
Radiation. Infrared waves travel directly from fire to face.
← Didn't Know|Knew It →
Which surface is a better radiator: dull black or shiny silver (same temperature)?
Which surface is a better radiator: dull black or shiny silver (same temperature)?
Tap to reveal answer
Dull black. Dark surfaces absorb and emit radiation efficiently.
Dull black. Dark surfaces absorb and emit radiation efficiently.
← Didn't Know|Knew It →
Which surface is a poorer absorber of thermal radiation: dull black or shiny silver?
Which surface is a poorer absorber of thermal radiation: dull black or shiny silver?
Tap to reveal answer
Shiny silver. Reflective surfaces minimize radiation absorption.
Shiny silver. Reflective surfaces minimize radiation absorption.
← Didn't Know|Knew It →