13 terms

# Stithsonianscience Forces & Motion 2017-18

Basic vocabulary for a middle school science unit on "Forces & Motion".
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force
any push or pull
gravity
attractive force between one "piece" of matter and all other "pieces" of matter
inertia
an object's resistance to a change in its motion
friction
two materials rubbing against each other
gravity and electromagnetism
Name two forces that "act at a distance"
electromagnetism
a force that can attract or repel
normal force
the force an object exerts perpendicular to its surface (i.e. floor up on your feet)
abnormal force
the force many of my students exert on their science teacher!! :)
force, mass, acceleration
Newton's Second Law of Motion describes how these three properties are related
weaker
Does the strength of forces that "act at a distance" get stronger or weaker the farther you move from the objects?
true
True or false: An object's gravity is stronger the more massive the object.
false
True or false: If gravity suddenly vanished, a book on a table would immediately float up and away.
field
Force extending beyond the object responsible for the force.