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