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Introduction To Non Contact Forces

Test Description: An introduction to gravity, magnetism, and electrical forces.

Instructions: Answer all questions to get your test result.

1) Even when your feet are not touching the ground, _________ pulls you toward the Earth's surface.

AGravity BMagnetism CFriction DElectrical forces

2) A non contact force that pulls objects toward each other as a result of their masses is called ______.

AMagnetism BGravity CElectrical forces DFriction

3) Which is NOT an example of a non contact force?

AGravity BMagnetism CStatic electricity DFriction

4) Opposite charges _________.

ACombine BRepel CDestroy each other DAttract

5) The two ends of a magnet are called _____________.

ALeft and Right BPositive and Negative CEast and West DNorth and South

6) What happens when two north poles of magnets are placed together?

AThey repel each other BThey attract each other CThey make the magnet twice as strong DThey cancel each other

7) Two objects have collected static electricity with the same charge. What would the objects do when placed near each other?

AThey would burst into flame BThey would repel each other CThey would change color DThey would be attracted to each other

8) What makes electrical forces stronger?

AUsing a bigger magnet BMore charge and less distance CMore mass DLess charge and more distance

9) Objects that can exert a force on things without touching them all have a __________.

AMagic BInvisible arms CForce field DThis is impossible. Things have to be touching to exert a force.

10) A compass is a small magnet that always points north. What does this tell us?

ASolar rays affect magnetism. BEarth is surrounded by a magnetic field. CWorkers in the factory have to set each compass to make it point north. DMagnets are magic.

*select an answer for all questions

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