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What is the energy store of a sandwich?
Chemical
What is the energy store of a battery?
Chemical
What are the energy store of a tennis ball flying through the air?
Kinetic and Gravitational potential
What is the energy store of a pulled sling shot?
Elastic potential energy
What is the energy store of an Uranium atom?
Nuclear
Energy cannot be created or destroyed [True/false]
True
The bubbles in boiling water contain oxygen [True/False]
False, they contain water as a gas (steam)
How are the particles of a solid arranged?
Closely packed, regular pattern, vibrating.
How are the particles in a liquid arranged?
Closely packed, disordered, moving over one another.
How are the particles in a gas arranged
Free to move in random directions with a range of speeds.
Heat energy always transfers from a hot object to a colder object [True/Flase]
True
What happens after a hot cup of tea has been left in the room for a long time.
Reaches the same temperature as the room (equilibrium)
Temperature is the total thermal energy stored in an object [True/False]
False - Temp is the average thermal energy
By what process does thermal energy transfer through a solid?
Conduction?
By which process does thermal energy transfer through a liquid or gas?
Convection
By which process does thermal energy transfer through space?
Radiation
What happens to the density of a gas when it is heated?
It becomes less dense.
What happens to hotter less dense air when surrounded by cooler more dense air?
The hotter less dense air rises.
Which of the 3 processes of thermal energy transfer is the gap in a cavity wall preventing?
conduction
Which of the 3 processes of thermal energy transfer is the silver coated foam in a cavity wall preventing?
Convection and radiation
What is in between the atoms of a metal which make metals such a good conductor of thermal energy?
Free electrons
Why did old coal mines light a fire at the bottom of one of their two shafts?
To create a convection current and get fresh air into the mine
Why can a thermal imaging camera see images even when it is dark?
The camera detects the thermal radiation being given off all objects.
Which colour material would be a good absorber and emitter of thermal radiation
Matt black
Which colour material would be a poor absorber and emitter of thermal radiation
Shinny silver or white
What is the name of a material which is a poor conductor of thermal energy?
An insulator
How many units of electricity is 10 kWh?
10 units


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