Page 109 - York Global Science 6 - Physical Science

Physical Science

Let’s Look

These two objects have balanced charges. They are neutral.

+ - + - + -
+ - + - + -

+ - + - + -
+ - + - + -
+ - - - - -+ + - - - - -
+ + + +
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When the objects are rubbed together, the friction makes electrons move
from the cloth to the plastic ruler.

+ + + +
- + + +
+ + - + +
+ + + + + - - - - - - -
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What is the electric charge for each object now?

Now rub two plastic rulers with a cloth.

Hang one ruler from a piece of string
and move the other ruler close to it.

What happens and why? -
What happens if you move the cloth -
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close to the ruler on the string? Why? -
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Record your answers on the worksheet -
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in the Workbook. - - + - - - -
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Let’s Reflect

1 Explain what makes static electricity happen.

2 What happens when two objects with opposite electrical charges are
close together?

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