Magnets and Static Electricity

The diagram shows a crane picking up pieces of iron.

Which problem is being solved by the use of a magnet in this picture?

• how to build tall houses

• how to make iron magnetic

• how to move heavy pieces of iron

• how to hold a crane and iron pieces together

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Which picture shows a push?

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The pictures show objects that are charged and objects that are not charged. Which picture shows two objects with the same charge?

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Jake hangs two balloons from a desk so that they are close together but not touching. Jake rubs one balloon with a wool cloth. He does nothing to the other balloon. What happens when he lets go of the balloons?

• They push one another apart.

• They touch one another and pop.

• They touch one another and stick together

• They are close together but do not touch.

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Which of these is an example of balanced forces?

• a book falling from a desk

• a computer sitting on a table

• a marble rolling down a ramp

• a car slowing down at a stop sign

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Aisha placed two balloons next to each other.

What are the charges on the balloons?

• They are both positive.

• They are both uncharged.

• One is positive and one is negative.

• One is negative and one is uncharged.

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Which object is most likely attracted to a magnet?

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Which object does a magnet attract?

• paper

• steel nails

• plastic bottle

• rubber bands

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Mary made a metal game board and put it on her wall. She made wooden game pieces to put on the game board. She wants the game pieces to stay on the board without falling off. The game pieces should be easy to remove so she can play the game again. How should she attach the game pieces to the board?

• buttons

• glue

• magnets

• nails

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What happens if you put the same poles of two magnets together?

• Nothing happens.

• The magnets repel each other.

• The magnets attract each other.

• The two magnets become one magnet.

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