Electrically Charged Objects

Adriana uses balloons to investigate electrically charged objects. Which of the following best explains what will happen when she brings two positively charged balloons close to each other?

• A.) The balloons will move apart.

• B.) One balloon will lose its charge.

• C.) The balloons will come together.

• D.) One balloon will gain a negative charge.

Lisa’s teacher hung a negatively charged balloon from the ceiling. She then asked the class what they needed to do to a second balloon in order for the two balloons to repel each other.
What should Lisa’s class do to the second balloon?

• A.) Take electrons away from the second balloon to make it positively charged.

• B.) Take protons away from the second balloon to make it negatively charged.

• C.) Add protons to the second balloon to make it positively charged.

• D.) Add electrons to the second balloon to make it negatively charged.

Samantha put her comb near a stream of water after she had combed her hair. The water moved toward the comb.

What is making the comb attract the water?

• A.) Combs are like magnets, they attract water.

• B.) The comb gained electrons, making it negatively charged, which attracts the neutrally charged water.

• C.) The comb gained protons, making it positively charged, which attracts the neutrally charged water.

• D.) The comb gained electrons, making it positively charged, which attracts the negatively charged water.

William rubbed a balloon across a square of carpet to give it an electric charge. As William brings the balloon near the pieces of paper, which of the following effects is most likely?

• A.) The paper will be attracted to the balloon if the paper and balloon have the same charge.

• B.) The paper will be attracted to the balloon if they have opposite charges.

• C.) The balloon will lose its charge to the paper, causing them to become very hot.

• D.) The balloon and paper will repel each other if the charges are different.

An electron is the part of an atom that can move.

What is the charge of a neutral atom AFTER an electron has been removed?

A.) Negative

B.) Neutral

C.) Positive

D.) Nucleus

• A.)

• B.)

• C.)

• D.)

Which of the following will most likely occur when a negatively charged object is brought near this positively charged object?

• A.) The objects will attract each other.

• B.) The objects will lose their charges.

• C.) The positively charged object will be repelled.

• D.) The positively charged object will move upward.

Two balloons are hanging from the ceiling and they are touching each other. What can you infer by the way the balloons are hanging?

• Neither balloon has a charge.

• Both balloons are negatively charged.

• Both balloons are positively charged.

• One balloon is positively charged, and one balloon is negatively charged.