Unit 2 Lesson 5 What Can Electric Forces Do?

What combination of charges will attract each other?

• a positive charge and a negative charge

• a negative charge and a negative charge

• a positive charge and a positive charge

• no charge and no charge

Which change will DECREASE the electric force between two charged objects?

• add more electric charges to them

• move them far apart

• rub them together

• bring them close together

What does an imbalance of positive and negative charges cause?

• static electricity

• magnetic attraction

• objects to repel each other

• all of these answers are correct

Which of these events is caused by electric charges?

• an earthquake

• a snowstorm

• a flood

• a lightning strike

Phoebe and her little brother are taking laundry out of the dryer. Her brother notices that some of the dry clothes stick together. Phoebe tells him it is because of static electricity. Why do Phoebe's brother's socks stick together?

• they only have positive charges

• they only have negative charges

• they have balanced positive and negative charges

• they have imbalanced positive and negative charges

If you want a balloon to attract more pieces of paper, you should....

• move the balloon farther away from the paper

• blow the balloon up bigger

• make the balloon smaller

• move the balloon closer to the paper

What type of charges will attract? (Choose ALL of the correct answers....there are two)

• negative and positive

• negative and negative

• positive and negative

• positive and positive

What type of charges will repel? (Choose ALL of the correct answers....there are two)

• negative and positive

• negative and negative

• positive and negative

• positive and positive

Objects are covered in _________ charges, but the charges are too small to see. These charges can build up in objects.

• magnetic

• electric

• repel

• attract

Electric forces between objects is strong when they are __________ together.

• close

• far

• weaker

• friends