Unit 1 (S8P5a: Force Fields) Magnetism and Gravity Quiz

How could you use magnets to hold a door open?

• Place a magnet on the door and a metal plate on the wall

• Use a magnet to attract the door to the floor

• Attach a magnet to the door handle

• Stick a magnet to the door frame

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Magnets attract when:

• They have opposite poles

• They have the same poles

• They are far apart

• They are made of plastic

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What is the name of the force that keeps the planets orbiting the sun?

• Electromagnetic Force

• Gravitational Force

• Nuclear Force

• Frictional Force

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If the glass rod is rubbed with a piece of silk and it is brought towards the positively charged pith ball (K) and it repels, what charge did the rod acquire from the silk?

• Positive

• Negative

• Neutral

• Cannot be determined

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How does a compass work?

• It uses the Earth's magnetic field to point north.

• It uses GPS signals to determine direction.

• It relies on the position of the sun.

• It uses a gyroscope to maintain orientation.

Why don’t we fall off the Earth?

• Because of gravity

• Because the Earth is flat

• Because of the atmosphere

• Because of the Earth's rotation

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What are the two factors that affect gravity?

• Mass and distance

• Speed and time

• Temperature and pressure

• Volume and density

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An object made of a conducting material will allow charge to be transferred.

• True

• False

Metals are the best insulators.

• True

• False

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If a charged conductor touches another object, the conductor can transfer its charge to another object.

• True

• False