Forces and Motion Flashcards

Grade 3 · Science · Flashcards

Study key vocabulary for forces, motion, gravity, and friction.

Flashcards

force: A push or pull that can change the motion of an object
gravity: A force that pulls objects with mass toward each other
friction: A force that resists motion between two surfaces in contact
motion: A change in the position of an object
speed: How fast an object moves; distance divided by time
balanced forces: Equal forces acting in opposite directions that cancel out, causing no change in motion
unbalanced forces: Unequal forces that cause a change in an object's motion
air resistance: A type of friction that slows down objects moving through air
weight: The measure of how strongly gravity pulls on an object
mass: The amount of matter in an object
applied force: A force directly exerted on an object, like a push or kick
direction: The path or way something is moving — up, down, left, right, etc.