8th grade Static electricity: like charges push, unlike charges pull worksheet

Static electricity: like charges push, unlike charges pull

Grade 8 Science Worksheet - Building Confidence

Circle the best answer, or write your answer on the line.

1. 1.

   After rubbing, Ari's balloon shows 3 + marks and 5 − marks. Each mark is one charge. How many extra electrons does it have?
2. 2.

   After rubbing, Bo's balloon shows 4 + marks and 7 − marks. Each mark is one charge. How many extra electrons does it have?
3. 3.

   After rubbing, Esme's balloon shows 2 + marks and 6 − marks. Each mark is one charge. How many extra electrons does it have?
4. 4.

   Jun rubs two balloons on hair, and both become negative. What do they do when held near each other?

   • They push apart
   • Nothing until they touch
   • They pull together
5. 5.

   A rubbed balloon is negative, and the hair it rubbed is positive. What happens when Kira holds the balloon near the hair?

   • The hair is pushed away
   • Nothing; hair has no charge
   • The hair is pulled toward it
6. 6.

   When Milo rubs a balloon on hair, which particles move from one to the other?

   • Electrons
   • Protons
   • New charges made by rubbing
7. 7.

   Rubbing leaves Noah's balloon negative. Which way did the electrons go?

   • Nowhere; rubbing made new ones
   • From the hair onto the balloon
   • From the balloon onto the hair
8. 8.

   After rubbing a balloon, why is Pia's hair positive?

   • It gained protons
   • It gained electrons
   • It lost some electrons
9. 9.

   In the charge diagram, which object is negative, Ren?

   • The hair, since it has 5 + marks
   • The balloon: more − than +
   • Both, since each has − marks
10. 10.

    Charge diagram. In the charge diagram, what will balloon A and balloon B do near each other, Zee?

    • Nothing, since both are negative
    • Push apart
    • Pull together