Energy resources and energy transfers - energy transfers

Question 1

Name the 8 energy stores

Answer 1

Chemical, kinetic, gravitational, elastic, thermal, magnetic, electrostatic,
nuclear

Question 2

Name the 4 energy transfers

Answer 2

mechanically, electrically, by heating, by radiation (light and sound)

Question 3

What is the principal of conservation of energy

Answer 3

Energy cannot be created or destroyed, it can only change from one form to another

Question 4

What is the relationship between efficiency, useful energy output and total energy output

Answer 4

useful energy output
Efficiency = ———————— x 100%
total energy input

Question 6

How could thermal energy transfer by…

Answer 6

by conduction, convection and radiation

Question 7

What is the role of convection in everyday phenomena

Answer 7

https://www.bbc.co.uk/bitesize/guides/zr7j382/revision/3#:~:text=Convection%20currents%20enable%20hot%20air,also%20due%20to%20convection%20currents.

Question 8

how are emission and absorption of radiation related to surface and temperature

Answer 8

Light, shiny surfaces are good reflectors of IR and so are poor at absorbing ??????????

Question 9

practical: investigate thermal energy transfer by conduction, convection and radiation

Answer 9

Second picture?
https://www.tutormyself.com/4-09-practical-investigate-thermal-energy-transfer-by-conduction-convection-and-radiation/

Question 10

What are ways of reducing unwanted energy transfer

Answer 10

Fit loft insulation (the roof).
Use double glazing (windows).
Use cavity wall insulation (walls).
Fit carpets (floors).
https://www.bbc.co.uk/bitesize/guides/zr7j382/revision/5