QR Challenge: iGCSE Chemistry Definitions

Created using the ClassTools QR Treasure Hunt Generator

Teacher Notes

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.

3. Print out the QR codes.

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

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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!

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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.

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Questions / Answers (teacher reference)

Question	Answer
1. A substance that forms H+ ions when it is dissolved in water	Acid
2. The minimum energy that must be provided before a reaction can take place	Activation Energy
3. A negatively charged ion	Anion
4. A substance that neutralises an acid	Base
5. The average energy associated with breaking or forming a particular covalent bond	Bond energy
6. A method for determining energy changes in reactions	Calorimetry
7. A chemical that speeds up a reaction but remains unchanged at the end	Catalyst
8. A negatively charged electrode	Cathode
9. A bond formed when electrons are shared	Covalent
10. A reaction in which one element takes the place of another in a compound	Displacement
11. Breaking down a compound using electricity	Electrolysis
12. A type of reaction when energy is taken in from the surroundings	Endothermic
13. A chemical reaction where the forwards and backwards reactions can both occur	Equilibrium
14. The sum of all the atomic masses of the atoms in a formula	Formula mass
15. A vertical column of elements in the Periodic Table	Group
16. The Group 7 elements	Halogens
17. Substance which changes colour in an acid or alkali	Indicator
18. A bond that involves the transfer of electrons	Ionic
19. Atoms of the same element that contain different numbers of neutrons	Isotopes
20. The total number of protons and neutrons in an atom	Mass number
21. A reaction in which an acid reacts with a base to produce salt plus water	Neutralisation
22. A mineral from which a metal may be extracted	Ore
23. The addition of oxygen or loss of electrons in a chemical reaction	Oxidation
24. A row in the Periodic Table	Period
25. The chemicals taking part in a chemical reaction	Reactants
26. The loss of oxygen or gain of electrons	Reduction
27. A substance that dissolves in a solvent to form a solution	Solute
28. The breaking down of a compound by heat	Thermal Decomposition
29. An accurate method for calculating the concentration of an acid or alkali solution in a neutralisation reaction	Titration
30. Amount of substance produced in a chemical reaction	Yield

 

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