s Flashcards
boiling point
temperature at which a substance changes from liquid state to gas state
condensation
change of state from gas to liquid by removing heat energy
conduction
flow of energy between substances that are in contact
conductor
material that allows heat energy or electricity to flow easily
convection
flow of heat energy that involves moving liquid or gas particles
freezing point
temperature at which a substance changes from liquid state to solid state
heat energy
energy that flows from matter at a higher temperature to matter at a lower temperature
insulator
material that does not allow heat energy or electricity to flow easily
kinetic energy
energy of movement ; particles that make up matter have kinetic energy
melting point
temperature at which a substance changes from a solid to a liquid state
particle theory of matter
model that explains the behaviour of solids, liquids and gases
radiation
flow of energy in the form of invisible waves
temperature
a measurement of the average kinetic energy of the particles in a substance
what is the difference between temperature, heat and thermal energy
temputure is the average kinetic energy, thermal energy is the total kinetic energy and heat is the energy that flows from matter at a higher temp to a lower temp
4 main points of the particle model of matter
all matter is made up of tiny particles
the particles are always moving
adding heat makes the particles move faster
the particles have space between them
thermal expansion
expansion of a substance caused by an increase in thermal energy
thermal energy
the total kinetic energy of the particles
solid
a state of matter, is a fixed volume, attached to each other in all directions
gas
a state of matter, the particles are not connected to one another
liquid
a state of matter, are loosely attached to each other
describe the volume, shape, kinetic energy and space of a solid
space between - no space, held together
volume and shape - holds shape, fixed volume
movement (kinetic energy) - vibrates or shake back and forth in a fixed position
describe the volume, shape, kinetic energy and space of a liquid
space - close together
volume and shape - fixed volume, shape of container
movement (kinetic energy) - can slip past each other, particles are weak
describe the volume, shape, kinetic energy and space of a gas
space - not together at all
volume and shape- volume and shape of container
particle movement - all directions
what is conduction, radiation and convection?
conduction- flow of energy between substances that are in contact
convection - flow of heat energy that involves moving liquid or gas particles
radiation - flow of energy in the form of invisible waves
