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3ScienceU2
3rd Grade Science Unit 2 Forces
| Question | Answer |
|---|---|
| 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
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