P2+ Specific Heat Capacity Flashcards
Year 9 (36 cards)
What is thermal conduction?
nergy is transferred by vibrating particles in a substance.
What type of materials are the best conductors of energy?
Metals.
What materials are the best insulators?
Non-metal materials like wool and fibreglass.
What does a higher thermal conductivity mean?
A higher rate of energy transfer through the material.
What effect does a thicker insulating layer have?
More material added = harder for heat go transmit
What does emit mean?
Give out.
What does absorb mean?
Take in
What does transmit mean?
Goes through
What do all objects do with infrared radiation?
Emit and absorb it.
What happens when an object gets hotter?
It emits more infrared radiation.
What is blackbody radiation?
A theoretical body that absorbs all radiation that hits it.
When does an object’s temperature increase?
It absorbs more infrared radiation than it emits thermal energy.
What is blackbody radiation?
Radiation emitted by a body that absorbs all radiation that hits it.
What factors affect Earth’s temperature?
Absorption of infrared radiation from the Sun and emission from Earth’s surface and atmosphere
What is infrared radiation?
Radiation made of waves that are spread out, invisible, and less dangerous than visible light. Heat
What is heat?
The thermal energy contained in an object.
What is temperature?
A measure of the average kinetic energy of the molecules.
What happens when thermal energy is transferred to an object?
Its temperature increases.
What is SHC specifically?
The energy needed to raise the temperature of 1kg of a material by 1°C.
What unit is SHC measured in?
J/kg°C.
What happens if SHC is low?
The object heats up faster.
What do objects with high SHC do?
Absorb and hold a lot of energy without getting very hot.
What are insulators?
Materials with low rates of energy transferring transmitting it.
What methods are used to heat houses?
Electric or gas heaters, gas/oil-fired central heating, and solid-fuel stoves.
