Heating And Cooling Flashcards
What is the difference between insulators and conductors?
Insulators don’t allow heat transfer while conductors do allow heat transfer.
Insulators Conductors
Rubber Silver
Wood. Nickel
What is the purpose of an insulator?
To prevent something from heating.
E.g. A pan handle would be covered in rubber to prevent your hand from burning.
How does the starting temperature of a substance affect the rate of cooling?
Different starting temperatures will have different speed to cool depending on the heat that is in.
What is thermal equilibrium
When the temperature of an object is the same temperature of its surrounding.
Eg. There is a hot tea in a cold room so the hot tea becomes cold at the same temperature of the room(room temperature) and if the tea is the same temperature as the room then it will stay the same temperature as the room.
What is conduction?
Heat transfer through one substance to another through direct contact.
How is thermal energy transferred through conduction?
When a substance is heated, it’s particles gain energy and vibrate more which make the particles bump into each other, which transfers thermal energy.
How is thermal energy transferred through convection?
It transfers from hot places to cold places.
From hot particles to colder particles.
What is radiation?
All objects transfer thermal energy with radiation. The hotter the object is the more radiation come out of it.
How do the particles change when thermal energy is added?
They start vibrating more and move faster making the object expand….
What happens to solids when they are heated?
The particles vibrate faster and it starts to expand…
