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Unit 6.4 Vocabulary

Forces & Motion Vocabulary

TermDefinition
Force a push or pull acting on an object.
Vector a quantity that has a magnitude and a direction; shown by an arrow representing a force in one direction - must be labeled.
Magnitude amount of something; how large or small something is, represented by the length of the vector arrow.
Force Pair The equal and opposite forces always present when two objects are in contact. The objects push together equally or pull apart equally.
Stable When the sum of the forces on an individual object add up to zero.
Balanced forces When the sum of the forces on an individual object add up to zero.
Unbalanced Forces When the sum of the forces on an individual object do not add up to zero.
Gravity A “downward” force exerted on everything that has mass by the earth.
Mass The amount of matter in an object.
Independent variable Variable/condition that is purposely changed in the investigation.
Dependent variable The measured results of the investigation.
Constants Variables/conditions that are kept the same in an investigation.
Control Group Something used to judge or measure against (in an investigation). Also sometimes referred to as a standard of comparison. “The original group that I can compare my results to.”
System Boundary Identifying precisely which components are within your system versus which are part of the outside environment
Fair Investigation An investigation or experiment in which the variables are carefully chosen and controlled. A fair investigation can be trusted to yield accurate results.
Created by: jstanulis_ems
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