# 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

• Download a QR reader (e.g. I-Nigma | NeoReader | Kaywa) onto their mobile devices
• 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. What is the name of aluminium ore?Bauxite
2. What solvent is used to dissolve aluminium oxide in the extraction of aluminium?Cryolite
3. The formula for ammonium sulfate is (NH4)2SO4. How many hydrogen atoms are there in this formula?8
4. What is the meaning of the state symbol (aq)?Dissolved in water
5. What is the empirical formula of C4H8O2?C2H4O
6. Which term describes the relationship between resistance and the cross section of a wire?Inversely proportional
7. If a current of 10 amperes flows through a 230 volt lamp, what is its resistance?23 ohms
8. What is the current if a charge of 25 coulombs passes in 5 seconds?5 Amps
9. What charge does an object have if it gains electrons?Negative
10. What occurs when like charges move close to each other?Repel
11. What type of wave is a sound wave?Longitudinal
12. How do we calculate refractive index?sin i รท sin r
13. How do we describe the image in a plane mirror?virtual and upright
14. What is the term that describes the changing direction of light when it changes medium?Refraction
15. What are the areas where particles are pulled further apart in sound waves called?Rarefaction
16. What is the name given to the range above human hearing?Ultrasound
17. What is the speed of sound in air?340 m/s
18. What are the units of frequency?Hertz
19. What is the correct scientific term for pitch?Frequency
20. What can split white light into its component colours?A prism
21. What type of electromagnetic radiation is used by mobile phones?Microwave
22. Which term describes alloys which include iron?Ferrous alloys
23. Where is the strongest magnetic field around a bar magnet?At the poles
24. What do opposite poles do?Repel
25. What is another term for substances that can only be temporarily magnetised?Soft
26. Specifically in which direction do the lines run in a field diagram (magnets)?North to south

### Year 11 scavenger hunt!: QR Challenge

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