Control  - the substance, object or group in an experiment that is not changed, controlled experiment - an experiment in which all the variables are kept the same except for the one being tested (fair test), force - a push or pull that can change the position or motion of an object / material, friction - a force that acts in an opposite direction to movement, gravity - a force that pulls objects toward each other, magnetism - a force that pushes or pulls a magnetic material across a distance, motion - a change in the position of an object, position - the place where something is located; where something has been put, pull - the act of applying force to move something toward or with you, push - the act of applying force in order to move something away, reliability - the extent to which an experiment, test, or investigation provides the same results on repeated trials, testable hypothesis - an idea that can be tested by experiment or observation, valid conclusion - information describing what was learned from an investigation based on observations and collected data, a condition in an experiment that is changed in order to determine the effect of that change - variable,

Investigating Forces

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