Science Unit Test- Electricity and Magnets

1. Sam built a circuit that would run a small motor. Sam’s circuit has changed the electrical energy into what other form of energy?

• A. sound
• B. heat
• C. motion
• D. light

2. Susan plugged her CD player into the electrical socket so that she could use it to practice the song she was going to sing in chorus tomorrow. Which statement explains why she could listen to her CD?

• A. The electrical energy was not changed.
• B. The electrical energy was changed into light energy.
• C. The electrical energy was changed into heat energy.
• D. The electrical energy was changed into sound energy.

3. Tonya wanted to build a circuit that would light a bulb. She collected the items below, but she is missing one component. What does Tonya still need to be able to build the circuit?

• A. Another wire
• B. A battery
• C. Another light bulb
• D. An electrical outlet

Tags

NGSS.3-5-ETS1-1

NGSS.3-5-ETS1-2

4. In which of the circuits below will the bulb(s) light up?

• 
• 
• 
• 

Tags

NGSS.MS-ETS1-1

NGSS.MS-PS3-5

5. Andrea could not figure out why her circuit would not work. Look at her circuit below. Can you help her figure out the problem? Which part of the circuit is not complete?

• A. Point A
• B. Point B
• C. Point C
• D. Point D

6. What does the part labeled 4 represent?

• A. conductor
• B. light bulb
• C. wire
• D. switch

7. What is true about the circuit above?

• A. The circuit is closed and the bubs are lit.
• B. The circuit is open and the bulbs are lit.
• C. The circuit is open and the bulbs are NOT lit.
• D. The circuit is closed and the bulbs are NOT lit.

8. Why are many electrical wires wrapped with a plastic coating?

• A. Because plastic is less expensive than steel.
• B. Because plastic is able to keep its shape.
• C. Because plastic is a good insulator.
• D. Because plastic is a good conductor.

9. Which of the following materials is the best conductor of electricity?

• A. glass
• B. copper wire
• C. rubber band
• D. piece of string

10. Bar magnets have two poles. What are they?

• A. north and south
• B. red and blue
• C. east and west
• D. red and green