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A scalar quantity (a number value) that refers to how far an object is from a reference point.

Where an object is located, relative to one or more reference points.

The overall velocity at which an object is moving; calculated by dividing the total displacement (motion in a particular direction) of the object by the total time taken to do so.

The velocity of an object in one instant (moment) of time.

The overall force on an object when all the individual forces acting on it are added together.

The state in which one object‘s distance from another is changing.

A reasonable prediction or possible explanation for a scientific question that can be tested.
(Most often a single sentence, a conditional "If-Then" statement; that states a relationship between two variables. If... something happens then... something else will happen.)

The single factor that a scientist deliberately changes (or tests) during an experiment; also called independent variable.

The factor that changes as a result of changes to the manipulated variable in an experiment.

Conditions or variables that are deliberately kept consistent in an experiment to prevent them from affecting the results.

A unit measure of force.

An observation (or data) that deals with characteristics that are not expressed in numbers.

An observation or data that is expressed as a number or amount.

A specific standard condition against which experimental results will be compared.

The overall rate of speed at which an object moves; calculated by dividing the total distance an object travels by the total time.

The speed of an object at one instant of time.

A system of measurement based on multiples of ten and on established measures including mass, volume and length; also known as International System of Units (SI).

A push or pull exerted on an object.

A set of equal forces acting on an object in opposite directions.

Forces that produce a nonzero net force, which changes an object’s motion.

A place or object used for comparison to determine if an object is in motion.

The distance an object travels in a given direction per unit of time. (Speed in a given direction. )

The base unit in the Metric system for length or distance, (slightly longer than a yard, about 39 inches).

The rate at which velocity changes. (In physics this can be motion that is slowing down, speeding up, or changing in direction.)

The natural law that states that an object at rest will remain at rest, and an object in motion will remain in that same motion unless it is acted upon by an unbalanced force. (Also referred to as the Law of Inertia.)

A ratio of two measurements or outcomes, often used to describe a mutual change in values, as in a change per unit of time.

The amount of matter in an object.

A measure of the force of gravity on an object.

A change or factor in a scientific experiment that could affect the results.

Prefix in Metric System meaning 1/100 of a base unit.

Prefix in Metric System meaning 1/1000 of a base unit. (This is the smallest unit mark on most metric rulers or meter sticks).

Prefix in Metric System meaning 1000 of a base unit.

A base unit in the Metric System for mass (and sometimes weight in non-science settings).

Description in physics that indicates both magnitude and direction.