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Science Physics

September-December

QuestionAnswer
The transfer of heat by direct contact between particles is called conduction = SOLIDS
The transfer of heat into liquids and gases through currents is called convection = LIQUIDS
The transfer of heat by infrared waves is called radiation = THROUGH A VACUUM eg: SPACE
A metal spoon gets hot in boiling water is an example of conduction
When air is warmer near the ceiling than the floor is an example of convection
A egg on a frying pan sizzles when it cooks is an example of conduction
When the sun melts a icy lawn is an example of radiation
What are the three types of heat transfers conduction, convection and radiation
Radiation is the transfer of heat by infrared waves
Convection transfers heat in liquids and gases by creating a Convection current
Do LESS dense substances rise or fall in their surroundings? Rise
What colour best ALLOWSD heat energy to pass through it by radiation? Black
What colour is best to PREVENT heat energy passing through it by radiation? Silver
When air is heated the particles move further apart
State a material which does not let heat pass through it easily insulator
Heat transfer through space Radiation
how is energy created energy CANT be created or destroyed its transferred/ transformed from one to the other
density wise what's the difference between Solids, liquids and gases solids are very dense fully packed, liquids are somewhat dense and packed, whilst gas aren't very dense at all
How to figure out density Density= mass/ volume volume= width x length x height
efficiency of device = energy in / energy out
how does conduction work solids are close in fixed positions and the particles vibrate about that position when heat is introduced they vibrate more vigorously and collide with others and share the heat
convection current . particles move faster when hot because of this they take up more space. fluids that are hot are less dense so rise into cold areas become more dense and sink into warm areas
Created by: EX Sharpe
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