the force that works against the motion of objects and slows them down
friction
the result of an experiment is also called
outcome
When one event makes another event happen, those events have a _____ relationship.
cause and effect
a part of an experiment that can be changed
variable
a rod or shaft that wheels can be attached to
axle
an angled surface, such as a hill or a ramp, is called
slope
a ______ is made up of two or more parts that work together
system
