2. 500 400 200 300 100 500 400 200 300 100 500 400 200 300 100 400 200 100 500 400 200 300 100 Purple Green Blue Red Orange 300 500

3. List the energy changes that occur in a light bulb circuit? Chemical into electrical energy into light and heat energy $100

4. Wind the wire more times around the core, wind the coils tighter, stronger power source What is one way to make an electromagnet stronger? $200

5. In a complete circuit, the D-cell? a. Controls the path of electricity b. Supplies the power c. Reduces the power d. Carries the electricity through the circuit B. Supplies the power $300

6. A nail stuck to a permanent magnet picked up a small washer. The nail could pick up the washer because? The nail became a temporary magnet $400

7. If two bar magnets are attracting a paper clip which one will have a stronger force: the paperclip 5cm away or the paper clip 10 cm away? The paper clip that is closer to the bar magnet will have the greater force (5cm) $500

8. You should have lines of force, a circular pattern and the north and south pole of magnet labeled Draw and label a magnetic field on a white board. $100

9. What tool would you use to measure temperature? thermometer $200

10. In a circuit that tests for insulators and conductors, a light bulb is used to? a. turn on the circuit b. show that electricity is running through the circuit c. reduce the power of the circuit d. carry the electricity through the circuit B. show that electricity is running through the circuit $300

11. On a white board list two items that would be considered conductors? Paper clip, nail, steel washer, etc. $400

12. What is the force called between 2 magnets? Magnetic force $500

13. What are the necessary materials needed to build an electromagnet? D-cell, wire, steel rod (rivet) $100

14. In a complete circuit what is the purpose of the switch? Opens and closes the circuit $200

15. On your white board draw a closed circuit. Use: 1 D-cell - 1 wire - light bulb $300

16. Why would a magnet attract a paper clip even when a thin piece of cardboard was placed between the magnet and paper clip, but would not when a thick sponge was placed between them? With the sponge the distance between the magnet and paper clip was too far – out of the magnetic field $400

17. You are using donut magnets to pick up paper clips. What could you do to make your magnetic field stronger? Add more donut magnets $500

18. Define an insulator? An insulator is a material that does NOT allow electricity to flow through it $100

19. List two insulators? Rubber, cardboard, plastic, etc. $200

20. Do all of the following items conduct electricity: rubber band, coin, metal fork, aluminum foil, plastic fork? No – the rubber band and plastic fork do not $300

21. What is a material that DOES conduct electricity but does NOT attract to a magnet? Aluminum, copper, brass $400

22. Draw on your white board two bar magnets that will repel one another Either N-N or S-S facing each other $500

23. What object would be the best conductor of electricity: wooden bat, metal fork, rubber duck, plastic spoon? Metal fork $100

24. True or False? A magnet will attract to both a metal fork and a plastic fork. false $200

25. Which of the following is an example of electrical hazard? Dead battery, broken solar panel, electrical cord with exposed wires, unplugged electrical cord. Electrical cord with exposed wires $300

26. Which tool is used by a scientist to measure weight? Spring scale in grams or kilograms $400

27. Draw two bar magnets that will attract to one another? N-S or S-N $500