P2 energy transfers by heating Flashcards
1
Q
what is specific heat capacity?
A
Amount of energy needed to raise temperature of 1 kg of a substance by 1°C
2
Q
What does the thermal conductivity tell you about the material?
A
How quickly energy is transmitted
3
Q
3 ways to insulate buildings
A
loft insulation
double glazed windows
cavity wall insulation
4
Q
what is infrared radiation
A
type of electromagnetic radiation
5
Q
Black body
A
Theoretical object that absorbs all radiation that falls on it
6
Q
what do greenhouse gases do?
A
Absorb infrared radiation and prevent it from escaping into space
7
Q
What increases levels of greenhouse gases?
A
human activity
Burning fossil fuels
Livestock farming
Deforestation
8
Q
name, 3 greenhouse gases
A
carbon dioxide
methane
Water vapour
9
Q
3 ways heat can be transferred
A
conduction
convection
radiation
