Physical Science Part 2 Study Guide

What is a circuit with no gaps or breaks in it?

• closed circuit

• open circuit

• mechanical energy

• sound energy

As two magnets move further and further away from each other, the strength of attraction:

• becomes weaker

• stays the same

• becomes stronger

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Choose the magnetic materials.

• paper and cloth

• Plastic and Iron

• steel and iron

• wood and silver

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• Increasing voltage increases electromagnetic strength

• Increasing the number of turns of wire decreases electromagnetic strength

• Increasing the number of turns of wire increases electromagnetic strength

• Increasing the number of turns of wire has no effect electromagnetic strength

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Which is an example of a temporary magnet?

• horseshoe magnet

• bar magnet

• electromagnet

• magnetite

A company uses an electromagnet instead of a bar magnet to lift a heavy piece of machinery because an electromagnet

• is less expensive

• has only one magnetic pole

• can be turned on and off

• is easier to install

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Which is true about electromagnets?

• increasing the battery makes it weaker

• increasing the number of coils makes them stronger

• they don't need a battery

• they are permanent

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• wooden pencil

• plastic ruler

• rubber band

• metal spoon

Lightening striking a tree during a storm would be an example of

• human harnessed fire

• human harnessed electricity

• naturally occurring fire

• naturally occurring electricity

Adding a second battery to an electromagnet will

• decrease the strength of the magnet

• decrease the resistance of the wire

• cause the magnet not to be magnetic at all

• increase the strength of the magnet

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