Physics flashcards

Front

Particle Model (4)

Back

all matter is made up of particles

particles are attracted to each other

particles always vibrate/move

as temp. increases, particles move/vibrate faster

Front

Kinetic Energy (3)

Back

energy of moving particles

all particles have kinetic energy

higher temp = higher kinetic energy

Front

Thermal Energy

Back

total kinetic energy of particles in an object

Front

Heat

Back

a measure of the thermal energy transferred between objects

Front

Temperature

Back

a measure of average kinetic energy of particles in an object

Front

Total Thermal Energy depends on (3)

Back

temperature: higher temp. = more thermal energy

mass: heavier = more thermal energy

material: some objects store thermal energy better

Front

Heat Transfer

Back

Movement of thermal energy from object with high temp. to object with low temp.

Front

Conduction (5)

Back

Solids

Energy is transferred via. contact

When substance gains energy, particles vibrate faster

When faster particles bump into slower particle, transfers some energy

Metal is good conductor because electron can leave atom and move freely

Front

Convection (6)

Back

Liquids and Gases

Flow of thermal energy in liquid/gas caused by movement of liquid/gas itself

When liquid/gas is heated, particles vibrate faster, space between increases, causing it to expand

Becomes less dense and higher in energy

Rises above colder liquid/gases

When runs out of energy, becomes dense again

Front

Radiation (3)

Back

Any object with thermal energy radiates heat

Don't need to be in contact to feel thermal radiation

Doesn't involve particle movement