Particle Theory
When a solid is heated the particles move faster and the solid ____
EXPANDS
What is thermal energy?
heat
CONDUCTION
What are the three states of matter?
solid, liquid, gas
The lowest temperature at which a substance begins to melt.
melting point
When a solid is cooled the particles move slower and the solid ____
CONTRACTS
How does thermal energy move?
The transfer of heat by the movement of fluid.
CONVECTION
Adding heat to a substance makes its _______ move quicker?
molecules, particles
freezing point
Which state of matter is described as having fast-moving high energy particles that are far apart?
GAS
An increase in thermal energy causes particles to...
spread out and move faster
The transfer of heat through waves.
RADIATION
Solid to a liquid
melting
the temperature at which a liquid becomes a gas.
Boiling point.
What is the name of the main character in The Breadwinner?
Parvana
What is the most common unit to measure temperature in?
CELSIUS
Name 3 types of insulators.
Name 3 types of conductors.
wood, glass, plastic
metal (iron, steel, aluminum), water
Liquid to a solid.
Freezing
Liquid to a gas.
vaporization & evaporation
The measurement of how fast particles are moving in a substance.
TEMPERATURE
How do you know thermal energy has stopped moving?
When the substances reach the same temperature (equilibrium)
So it doesn't break in the changing temperatures.
Gas to a solid. Solid to a gas.
Sublimation