Attract or repel?

Look at the diagram of the two balloons, one with negative charges and one with positive charges. What happens to the balloons?

• A. They move together.

• B. They push each other apart.

• C. They stay still.

How would you explain your last answer?

• A. Opposite charges pull together.

• B. Opposite charges don’t push or pull each other.

• C. Opposite charges push apart.

What happens to the balloons?

• They stay still.

• They attract each other.

• They repel each other.

How would you explain your last answer?

• A. Opposite charges attract.

• B. Opposite charges repel.

• C. Opposite charges don’t attract or repel each other.

Look at the diagram of two balloons, each with positive charges. What happens to the balloons?

• A. They stay still.

• B. They attract each other.

• C. They repel each other.

Look at the diagram of two balloons, each with positive charges. How would you explain your last answer?

• Like charges attract.

• Like charges repel.

• Like charges don’t attract or repel each other.

• Positive charges attract.

• Positive charges repel.

Look at the diagram of two balloons with negative charges. What happens to the balloons?

• They stay still.

• They attract each other.

• They repel each other.

Look at the diagram of two balloons with negative charges. How would you explain your last answer?

• A. Like charges attract.

• B. Like charges repel.

• C. Like charges don’t attract or repel each other.

• D. Negative charges attract.

• E. Negative charges repel.

These balloons repel each other. The same balloons are moved further apart. What happens to the balloons?

• They do not repel each other.

• They repel each other with more force.

• They repel each other with less force.

• They repel each other with the same force.

These balloons repel each other. The same balloons are moved further apart. How would you explain your last answer?

• The size of charge on the balloons is the same.

• Electrostatic force only works close to a charge.

• Electrostatic force gets smaller away from a charge.

• Electrostatic force gets bigger away from a charge.