P1.1 Flashcards
What are the states involving melting?
Solid to liquid
What are the states involved in condensing?
Gas to liquid
What are the states involved in subliming?
Gases and Solids
In a solid, are the volume and shape fixed?
Volume: fixed
Shape: fixed
In a liquid, are the volume and shape fixed?
Volume: Fixed
Shape: Not fixed
In a gas, are the volume and shape fixed?
Volume: Not fixed
Shape: Not fixed
What is the difference between boiling and evaporation?
Evaporation is when particles escape from the surface of the water and boiling is when particles escape inside the water. Evaporation doesn’t need as much heat as boiling.
What material is the best conductor: Glass, steel, brass, copper, aluminium?
Glass
What material is the best insulator: Glass, steel, brass, copper, aluminium?
Brass
Using ideas about particles, explain how double glazing works
Double glazing works as air is trapped between two sheets of glass so heat isn’t conducted through the glass as the sheets aren’t touching.
How does convection work?
The particles heat up and become less dense so they rise up above the denser material. However, when the particles are away from the heat, they start to cool and become more dense, therefore they fall. The current starts again and repeats. These are called convection currents.
Where does heat flow from?
From a warm area to a cold area
How can you reduce the loss of heat through conduction?
By using good insulators like gases or a vacuum.
How can you reduce the loss of heat through convection?
By putting a lid over because then there is no where for the heat to escape
How can you reduce the loss of heat through radiation?
By storing things like food in shiny light surfaces so they radiate less energy than most other surfaces.
