Science Summative Practice

A compass needle is a

• Electromagnet

• Sewing tool

• Permanent Magnet

• Loos Magnet

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When the electromagnet or the magnet move, they have ___ energy

• Strong

• Kinetic

• Potential

• Electrical

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The geographic north pole is the magnetic​ (a)   pole and the geographic south pole is the magentic​ (b)   pole

• south
• north
• east
• west

Opposites attract

• True

• False

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A​ ​ (a)   OR a​ (b)   can provide energy ro an electromagnet, light bulb, and a speaker

• battery
• computer
• wire
• speaker

What happens to the bell when the hammer strikes it?

•   The bell deforms.  B.  The hammer has a greater force than the bell.

• The bell deforms temporarily.  B.  The force on the hammer is equal and opposite to the force of the bell on the hammer.

• The bell deforms permanently.  B.  The force on the hammer and the bell are equal and opposite in direction.

• The bell deforms.  B.  The force on the bell is equal and in the same direction as the hammer.

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In order to change the polarity of an electromagnet, you can _______________.

• create a parallel circuit

• add another coil of wire

• add an odd number of switches and lightbulbs

• reverse the battery

More electrical current flowing wil produce a ​ (a)   light bulb or a ​ (b)   sound (speaker).

• brighter
• louder
• higher
• lower