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Physics vocabulary
6th Grade
Question Answer
physics the scientific study of the interaction of matter and energy
force any push or pull on an object
Newton the standard international unit as a measure of force
gravity the force that pulls objects toward each other(ex: Earth's gravity pulls objects to the ground.)
matter anything that has mass and takes up space
mass the amount of matter in an object
weight a measure of the force of gravity on an object
motion the process of changing position or place relative to another object (movement)
inertia an object at rest tends to stay at rest; an object in motion tends to stay in motion
balanced When opposite forces on an object are equal, the forces are ___________
unbalanced When forces acting on an object are uneven they are ______________.
Balanced forces result in _____________. no motion
Unbalanced forces result in ____________. motion
An object is in motion when its distance from another object (the reference point) is ___________. changing
reference point A place or object used for comparison to determine if something is in motion.
The basic SI unit of length is the _______. meter
There are ________ centimeters in a meter. 100
speed the distance an object travels in one unit of time, such as miles per hour
Calculate speed by dividing ___________ by ____________ distance; time
velocity speed in a given direction; such as 25 km/h eastward
The vertical line (up and down) on a graph is the _______ axis. y
The horizontal (side to side) line on a graph is the ________ axis. x
On a graph showing motion, the y axis represents ___________. distance
On a graph showing motion, the x axis represents ____ time
On a graph showing motion, a flat line means ______ motion no
[See textbook p. 94]
net force the overall force acting on an object
Force is measured by a ___________. spring scale
friction friction is the force that one substance exerts on another when the two rub against each other.