8th Grade Physics Assessment PS2-3

First & Last Name

1. Why can you get a shock if your touch a metal doorknob after walking across a wool carpet?

• You have gained electrons the doorknob has no electrons
• You have lost electrons, the doorknob has many electrons
• You have gained protons and the doorknob has gained electrons
• You have gained neutrons, the doorknob has last neutrons

2. Two balloons are rubbed with a piece of wool. What will happen if the two balloons are brought close to each other?

• The balloons will repel each other
• The balloons will attract each other
• The balloons will pop
• The Balloons will become magnetized

3. What type of charges attract?

• Neutral and Positive
• Negative and Negative
• Positive and Positive
• Positive and Negative

4. What charge does a proton have?

• Negative
• Neutral or no charge
• Positive

5. What is static discharge?

• Electrons moving quickly from one object to another in order to restore charge balance
• Protons moving from one object to another
• Electrons moving to create charge imbalance
• A light bulb coming on when a switch is turned

6. An energy field can be demonstrated through (check all that apply)

• Magnets attracting certain objects
• Static electricity making objects move
• Eating sugar
• Riding a bike

7. Which of the following is true about an electromagnet?

• Their strength is set and there is not much you can do to adjust the strength
• They do not produce an energy field
• They can be turned on and off by opening the electrical circuit

8. What happens when two North poles of magnets are placed together?

• They will attract to each other
• They cancel each other out
• The strength of the magnet is doubled
• They will repel away from each other

9. Magnets can be used in industry in the following areas. (check all that apply)

• Medicine
• Security
• Computers
• Banks and credit cards