| A | B |
|---|
| When a balloon is rubbed against a person's hair, the balloon becomes charged by | friction |
| An object is charged positively when rubbed with a piece of silk. The object became charged by | losing electrons |
| When a plastic rod is rubbed with wool, the wool acquires a positive charge because | electrons are transferred from the wool to the rod. |
| How is a positive charge usually given to a neutral object? | electrons are removed from the object. |
| When a rubber rod is rubbed with fur, the rod becomes negatively charged due to the transfer of | electrons to the rod |
| When hair is combed with a hard rubber comb, the hair becomes positively charged because the comb | removes electrons from the hair |
| A positively charged body must have | a deficiency of electrons |
| A device commonly used to detect the presence of a static electric charge is | an electroscope |
| When you rub an inflated balloon against a wool sweater, the balloon may then "stick" to a wall. This is due to | an increase in the number of electrons on the balloon. |
| A charged electroscope can detect | either positive or negative charge |
| Two objects, A and B, are rubbed together. If object A acquires an excess of 100 electrons object B must have | lost 100 electrons |
| foam plate | insulator |
| aluminum foil | conductor |
| paper | insulator |
| silver ring | conductor |
| lead | conductor |
| glass | insulator |
| In a magnetic _____ all of the north poles face in one direction, while all of the south poles face in the opposite direction | domain |
| the magnetic forces surrounding a magnet are referred to as a magnetic | field |
| the needle of a compass points toward the __ pole | north |
| we are protected from harmful solar radiation by Earth's | magnetosphere |
| An ______ is a region of the atmosphere that glows | aurora |
| A ______ is a magnetic tool used in navigation | compass |
| Electric charge | the gain of static electricity |
| electric force | the force between charged objects |
| Electric current | the rate charge passes a given point |
| charging by direct contact is called | conduction |
| materials that allow electrons to travel through them easily are called | conductors |
| if like poles of two magnets are brought together, they will ______ eachother | repel |
| Why do leaves of an electroscope separate when a charged object is brought close? | they are like charges |
| static electricity | the build-up of electric charges on an object |
| insulator | an object that electricity doesn't pass through |
| parallel circuit | a circuit that has 2 or more paths |
| series circuit | a circuit that has 1 path and all objects are connected. |
