Science 9 Final Review Electricity

Some particles in an atom are charged. Those that are positively charged are called:

• neutrons

• electrons

• positrons

• protons

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NGSS.MS-PS2-3

When charged objects are brought close to uncharged (neutral) objects, the following occurs inside the neutral object

• charge separation

• electrical discharge

• charge neutralization

• charge atomization

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NGSS.MS-PS2-3

The laws of electric charges include all of the following except

• opposite charges attract each other

• opposite charges repel each other

• similar (like) charges repel each other

• charged objects attract neutral objects

When you feel or see a spark while touching a doorknob – after rubbing your feet across a carpet, the spark is referred to as

• static spark

• electric charge

• current discharge

• electrical discharge

Which of the following examples can be used to demonstrate the behavior of current electricity?

• water flowing down a river

• water contained in a hot water tank

• water being held back by a dam

• water freezing on a lake

After removing the laundry from the clothes dryer, you notice that two socks are sticking together. An explanation for what has happened is

• one of the socks has gained electrons from the other sock, causing it to become negative while causing the other sock to become positive

• both socks have gained protons and, as a result, are attracted to each other

• protons have moved from one sock to the other, making one positively charged sock and one negatively charged sock

• both socks have gained electrons and, as a result, are attracted to each other

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

An electrical current can only be produced if there is a

• large quantity of particles

• a steady flow of charged particles

• a safe supply of energy

• discharge of electricity

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NGSS.HS-PS2-5

The units used to measure the flow of an electric current are

• amperes

• potential energy

• volts

• ohms

Which of the following objects would an electrical current most likely have a difficult time passing through?

• rubber eraser

• pencil lead

• paper clip

• copper wire

When electricity takes a path that is unintended, it is called a

• incomplete circuit

• incomplete pathway

• short circuit

• short pathway