Term

Definition
Energy is a calculation tool 


Term
What units is energy measured in? 

Definition


Term

Definition
Power is the rate of energy transfer 


Term

Definition


Term
What units is power measured in? 

Definition


Term
Fuels and foods are examples of what energy store? 

Definition


Term
A mass lifted up is what energy store? 

Definition
Gravitational store of energy 


Term
The equation for calculating energy in a gravitational store is... 

Definition


Term
A moving mass is what energy store? 

Definition


Term
The equation for calculating energy in a kinetic store is... 

Definition


Term
A mass heated up is what energy store? 

Definition


Term
The equation for calculating the change in energy in a thermal store is... 

Definition


Term
Something bent, stretched or squashed is what energy store? 

Definition


Term
The equation for calculating the energy in an elastic store is... 

Definition


Term
Particles in the nucleus of an atom are what energy store? 

Definition


Term
The equation for calculating the energy in a nuclear store is... 

Definition


Term

Definition
The energy transfer pathway when a force is moving 


Term
What is the equation for calculating energy transferred through mechanical work? 

Definition


Term
Is an electric circuit an energy store or a energy transfer pathway? 

Definition


Term
What are the equations for calculating the rate of energy transfer (power) in an electric circuit? 

Definition


Term
Give examples of ways that energy is transferred by heating by particles 

Definition
Conduction and convection 


Term
Give examples of ways that energy is transferred by heating by radiation 

Definition


Term
Would you normally treat a sound wave as an energy store or a transfer patheway? 

Definition


Term
How does conduction transfer energy? 

Definition
Energy is transferred from one vibrating particle to the next 


Term
How does convection transfer energy? 

Definition
Energy is transferred by the movement of a fluid 


Term

Definition


Term
Describe a convection current? 

Definition
A fluid is heated The particles move faster Collisions make the particles move further apart The fluid expands So the density of the fluid decreases The less dense fluid rises Colder, more dense fluid takes its place 


Term
Light, shiny surfaces are... 

Definition
Poor absorbers of IR radiation Poor emitters of IR radiation They reflect a lot of IR radiation 


Term
Dark, matt surfaces are... 

Definition
Good absorbers of IR radiation Good emitters of IR radiation They do not reflect much IR radiation 


Term
If the average speed of particles increases, what measurement must increase? 

Definition


Term
When a substance melts, what happens to the energy in the thermal store? 

Definition


Term
When a substance solidifies, what happens to the energy in the thermal store? 

Definition


Term
When a substance boils, what happens to the energy in the thermal store? 

Definition


Term
When a substance condenses, what happens to the energy in the thermal store? 

Definition


Term
When a substance changes state, what happens to its temperature? 

Definition


Term
When a substance changes state, what happens to bonds between particles? 

Definition
They are broken or formed 


Term
When a substance changes state, what happens to the average speed of the particles? 

Definition


Term
Define specific latent heat of a substance 

Definition
The amount of energy transferred when 1 kg of a substance changes state 


Term
What is the equation for specific latent heat? 

Definition


Term
Specific latent heat of fusion is for... 

Definition


Term
Specific latent heat of vapourisation is for... 

Definition


Term
Which is bigger for any substance, specific latent heat of fusion, or vapourisation? 

Definition

