C - The Transfer Of Energy By Heating Processes And The Factors That Effect The Rate At Which That Energy Is Transferred Flashcards
Heat energy tends to flow away from a ______ object to its _______ surroundings.
Hotter
cooler
Name the three ways that heat energy is transferred?
- Radiation
- Conduction
- Convection
Heat radiation is?
It’s the transfer of heat by infrared radiation
Conduction and convection involve the transfer of energy by ________.
Particles
Conduction is?
The main form of heat transfer in SOLIDS
Convection is?
The main form of heat transfer in LIQUIDS AND GASES.
Infrared radiation is when…
Objects continually emitting (give off) or absorbing infrared radiation.
Radiation depends an awful lot on… (2)
- Surface colour
* Texture
When you heat a substance it gives its particles - in solids, liquids and gases - more _____. This means they VIBRATE or MOVE FASTER. This is what eventually causes solids to melt and liquids to boil.
Kinetic energy
Conduction of heat energy is the process where…
VIBRATING PARTICLES pass on their EXTRA KINETIC ENERGY to NEIGHBOURING PARTICLES.
Metals are good conductors because…
They have free electrons get hot and then move around the metal and therefore spread this heat to other free electrons.
Convection is when…
Is when particles with a lot of heat energy in a liquid or gas move and take the place of the particles with less heat energy. Convection currents are all about changes in DENSITY. COLD is more sense than HOT.
Condensation is when…
A gas turns into a liquid. The particles in the gas slow down and lose kinetic energy. The attractive forces between the particles then pull them closer together.
Evaporation is when…
A liquid turns into a gas. The particles escape from the liquid.
U-value are…
How fast heat can transfer through a material
