4.1 Flashcards
What is heat
It is a form of energy that can transfer through solids, liquids and gases
Draw an atom
Picture
Where does the heat energy go when you add it to a particle
Stored as potential energy and kinetic energy
What is kinetic energy
Is the energy of movement
Particles slow down and substance contracts, why does this happen
When they lose the kinetic energy
What happens when sufficient heat is added to a solid liquid or gas
Particles break free from each other, evaporates,melts
Temp is measured using a thermometer.
True or false
True
What is temp measured in
Degrees Celsius
When heat flows from an area of high temp to an area of low temp. What is this called
Heat transfer
What are the 3 process of heat. And give an example
- Conduction- eg saucepan
- Convection- eg fireplace
- Radiation- eg hot water systems
What is a conductor. And a example of one
A substance that transfers heat easily
Metals, glass etc
Substance that limit or block heat transfer are know as…
List 2 examples
Insulators
Eg- rubber, wood
Why do they put plastic on the handle of saucepans?
Because u it insulates the heat, doesn’t let the heat flow
What is convection
Draw a picture
When hot air is pushed up by cold, hot air comes up cold air goes down, keeps going.
Picture
What is radiation, and what absorbs it?
Example
Transmits heat as invisible waves that travel at the speed of light
White absorbs it.
Eg- sunburns
