# Print

## A. Prior to the lesson:

1. Arrange students into groups. Each group needs at least ONE person who has a mobile device.

2. If their phone camera doesn't automatically detect and decode QR codes, ask students to

• Bring these devices into the lesson.

4. Cut them out and place them around your class / school.

## B. The lesson:

1. Give each group a clipboard and a piece of paper so they can write down the decoded questions and their answers to them.

2. Explain to the students that the codes are hidden around the school. Each team will get ONE point for each question they correctly decode and copy down onto their sheet, and a further TWO points if they can then provide the correct answer and write this down underneath the question.

3. Away they go! The winner is the first team to return with the most correct answers in the time available. This could be within a lesson, or during a lunchbreak, or even over several days!

## C. TIPS / OTHER IDEAS

4. A detailed case study in how to set up a successful QR Scavenger Hunt using this tool can be found here.

### Question

1. a is opposite and b is like chargesWhat type of electric charges a. attract each other? b. repel each other?
2. charging by frictionHow do clothes in a dryer acquire static cling?
3. electrically neutralWhat charge do you have after acquiring a positive charge from walking across a carpet then touching a doorknob and receiving a shock?
4. The Law of Conservation of ChargeWhat states charges are not created or destroyed?
5. static dischargeWhat is the loss of static electricity as electric charges move off an object?
6. static electricityWhat is the buildup of charges on an object?
7. electroscopeWhat is an instrument that can detect the presence of an electric charge?
8. electric circuitWhat is a complete, unbroken path through which electric charges can flow?
9. conductorsWhat materials allow the charges of an electric current to move freely through them?
10. wood, plastic, and glassList 3 examples of insulators.
11. ampere/volt/ohmWhat is the unit for electric current? voltage? resistance?
12. terminalsWhat parts of the cell are used to connect an electrochemical cell to a circuit?
13. electrochemical cell/batteryWhat is a device that transforms stored chemical energy into electrical energy?
14. resistance is equal to voltage divided by currentWhat is Ohm's law?
15. voltmeterWhat is a device used to measure electrical potential energy difference, or voltage?
16. switchWhat is a device used to open and close and electric circuit?
17. voltage x currentHow do you calculate power?
18. see page 186Draw a parallel circuit with a switch and label it.
19. see page 185Draw a series circuit with a switch and label it.
20. electrically groundedWhat is a circuit if it can carry electric current from a short circuit directly to Earth?
21. static discharge lasts for only a fraction of a secondHow is static discharge different from a electric current?
22. electrical powerWhat is the rate at which an electrical device converts energy from one form to another?
23. R=V/IWhat is the relationship between current, resistance, and voltage difference?
24. A very large discharge of static electricity due to charges in the clouds separating to positive on top and negative on bottom causing the Earth's surface to become charged.What is lightning?
25. circuit breakerWhat is a device designed to open an overloaded circuit and prevent overheating?
26. decreasesWhat happens to resistance as more branches are added to a parallel circuit?
27. 180 kWhIf an electric water heater uses 60 kW of power and runs for 3 hours, what is the total amount of energy used?
28. 36 wattsIf a householdâ€™s voltage is 120 volts, what is the power rating of a light bulb with 0.3 amps of current flowing through it?
29. 4 ohmsWhat is the resistance for a current of 2 amps and a voltage of 8 volts?
30. .1 ampsWhat is the current produced with a 6-volt battery through a resistance of 60 ohms?
31. 1200 voltsWhat voltage produces a current of 40 amps with a resistance of 30 ohms?

### Chapter 6 Electricity Study Guide ANSWERS: QR Challenge

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