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Science
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Question | Answer |
---|---|
conductor | a material through which electic current passes easily ex: metal |
insulator | a material through which electric current does not pass easily ex: glass, plastic, rubber |
closed circuit | a closed path through which electric current passes |
open circuit | an open path through which electric current does not flow |
Series Circuit | a circuit that connects several objects one after another so that the current flows in a single path |
Parallel Circuit | a circuit that connects several objects in a way that the current for each object has its own path |
magnet | anything that pulls iron, steel, and certain other metals to it |
magnetism | the force around a magnet |
magnetic field | the space arond a magnet where magnetism acts |
pole | a place on a magnet where magnetism is strongest |
compass | a small magnet that can turn freely |
generator | a machine that uses an energy source and a magnet to make electricity |
electromagnet | a magnet made when an electric current flows through a wire |
When two objects have different electric charges, they | pull together |
Electric current is the flow of | negative charges through matter |
Every time you turn on a light, you | close an open circuit |
When you turn off one lamp, all the lights in the room go off. The electric alliances must be connected to | a series circuit |
If you connect too manny appliances to one circuit, the wires can | overheat and cause a fire |
Frayed or broken insulation is dangerous because it can | cause a fire or electric shock |
You hold the south poles of two magnets near each other. The poles will | repel each other |
If a magnet is allowed to swing freely, the north-seeking pole will point | north |
When you push the button on a doorbell, you are | closing a circuit |
As you rub a balloon on your sleeve, it picks up a _____________ charge | negative |
If you sprinkle tiny pieces of iron over a magnet, the pattern formed shows a | magnetic field |
Electric generators have huge electromagnets plus a | power source |