1
variable that is changed in an experiment
independent variable
a system in which matter CAN move in or out
open system
A state of matter with no definite shape or volume
gas
has the most kinetic energy
hot water
For every action there is an equal and opposite reaction
Newton's Third Law
variable that is measured in an experiment
dependent variable
a system in which no matter is allowed to enter or leave
closed system
How fast or slow particles move
kinetic energy
has the least kinetic energy
cold water
the energy a moving object has
kinetic energy
variable that stays the same
constant variable
state of matter
solid, liquid, gas
The change of a substance from a liquid to a gas
evaporation
a transfer of energy from warmer substances to cooler substances
heat
stored energy
potential energy
a group of parts that work together as a whole
system
A state of matter that has a definite shape and a definite volume
solid
The change of state from a gas to a liquid
condensation
An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Newton's First Law
Is warm air less or more dense than cold air?
less dense
a representation of something
model
A state of matter that has no definite shape but has a definite volume.
liquid
small portion of matter
particle
Force = mass x acceleration
Newton's 2nd Law
What maximizes thermal energy transfer?
conducting materials