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3ScienceU2

3rd Grade Science Unit 2 Forces

QuestionAnswer
balanced forces forces that cancel each other out-equal in size and opposite direction
electricity a form of energy produced by the flow of electric charges
force a push or a pull- may cause a change in an object's motion
gravity a force that pulls two objects toward each other, like the Earth and objects on it
magnet an object that attracts iron and a few other metals
net force the combination of all the forces acting on an object
static electricity the buildup of electric charges on an object
unbalanced forces forces that cause a change in an objects motion because they don't cancel each other out
Things you can push shopping cart, swing, basketball, vacuum, lawn mower
Things you can pull a wagon, suitcase, sled, curtain cord
What is an example of balanced (zero net) forces? a book sitting on a table
static electricity the buildup of electricity in an object
magnetic attraction N + S poles
example of an electromagnet machines used to pick up cars
What kind of ramps will make a car go faster? steep ones
Strong pushes will make a rolling object go ... farther and faster
Heavy objects take ... more force to move
A simple machine that makes a ramp inclined plane
A simple machine that is on a lightbulb screw
A simple machine that makes up a wheel on a bike wheel and axle
A simple machine that can help open a paint can lever
Created by: aihara99