Electrically Charged Objects

Carlita hangs two balloons from a desk. When they hang normally, they are close together but they do not touch. Carlita rubs both balloons with a wool cloth. What happens when she lets the balloons hang near one another?

• 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.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Cecilia is combing her hair. She notices that her hair and the comb have developed an electric charge. What will happen when she holds the comb near a small, uncharged object?

• The uncharged object will stay where it is.

• The uncharged object will stick to the comb.

• The uncharged object will be pushed away by the comb.

• The uncharged object will gain a charge opposite that of the comb.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Curtis uses a wool cloth to give a balloon a negative charge. What will happen when he holds the balloon near the wall, and why?

• The balloon will stick to the wall because a negatively charged object is attracted to an uncharged object.

• The balloon will stick to the wall because a negatively charged object is attracted to another negatively charged object.

• The balloon will not stick to the wall because a negatively charged object is repelled by an uncharged object

• The balloon will not stick to the wall because a negatively charged object is repelled by another negatively charged object.

Tags

NGSS.MS-PS2-3

• Give them both a negative charge.

• Give them both a positive charge.

• Give only one of them a positive or negative charge.

• Remove any positive or negative charge from both balloons.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

• They are both positive.

• They are both negative.

• They are both uncharged.

• One is positive and one is negative.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

• Combing the hairs caused them to lose their static charge.

• Combing the hairs caused the comb to lose its static charge.

• Combing the hairs gave them a charge that is opposite the charge on the comb.

• Combing the hairs gave them a charge that is the same as the charge on the comb.

Tags

NGSS.MS-PS2-3

If two objects have the same charge what will happen?

• They will attract each other

• They will repel each other

• They will touch each other

• They will Stick together.

Tags

NGSS.MS-PS2-3

Wanda demonstrates the interaction of electric charges by rubbing a balloon against her wool sweater. When she lets go of the balloon, it sticks to her sweater. When she places the balloon against the wall, it also sticks to the wall. Why is this demonstration considered a scientific investigation but not an experiment?

• It uses balloons, which are not traditional objects of scientific study.

• It involves an item of clothing, which cannot be observed with objectivity.

• Wanda has not identified variables or created a controlled testing situation.

• Wanda has demonstrated a phenomenon that can’t be explained by science.

• They are both uncharged

• One is charged and the other is not

• They have the same charge

• One has a positive charge and the other has a negative charge

Tags

NGSS.MS-PS2-3

Mandy combs her hair with a plastic comb. This causes the comb to become negatively charged. Which of the following would all be attracted to the comb?

• a positively charged object and an uncharged object

• a negatively charged object and an uncharged object

• a positively charged object and a negatively charged object

• a negatively charged object, a positively charged object, and an uncharged object

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5