# 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. What is the charge of a proton?positive
2. What is the charge of a neutron?no charge
3. What is the charge of an electron?negative
4. Where are protons and neutrons found?in the nucleus
5. What is the smallest subatomic particle?electron
6. If the atom has no charge it has the same number of…protons and electrons
7. What two subatomic particles determine the overall mass of the atom?protons and neutrons
8. The element Bromine (#35) isa nonmetal
9. The element Iron (#26) isa metal
10. All of the elements in group 1have one electron in their outer shell
11. All of the elements in group 8 have a full outer shell
12. The Noble Gases do not react with other elements. This is because they have a full outer shell and do not need electrons
13. What element is this? argon
14. Draw the lewis dot diagram of sulfursee drawing
15. When an atom gives or takes an electron, it becomes a(n)ion
16. A charged atom with a positive charge is called…cation
17. unequally is called …a polar covalent bond
18. A compound that is formed between a metal and a nonmetal is…an ionic bond
19. A solution is made of NaCl (salt) and water. Water would be considered to be…the solvent
20. What would a reaction between carbon and fluorine look like? see drawing
21. Kinetic energy or heat is caused by the movement and motion of atoms and molecules
22. The measure of kinetic energy is calledtemperature
23. Calculate the amount of energy in a 600g aluminum cup that is heated to 105⁰C13545J
24. Calculate the amount of energy it takes to heat up a teapot with 1500g of water at 25⁰C all the way up to boiling at 100⁰C.470,700J
25. Which substance in the table above would require the least amount of energy to change temperature?aluminum
26. A double pane window is filled with gas in the middle. Which gas would be a better insulator: normal air, specific heat of 1.0 kJ/g⁰C or Argon, specific heat of 6.9kJ/g⁰C?Argon
27. An example of the First Law of Thermodynamics is…The amount of heat energy before and after mixing is the same
28. Which shows the correct illustration of heat flow?C
29. A basketball player fell on his elbow. The trainer got a bag from the first aid kit that got cold when bent and shaken. This would be an example of a(n)….endothermic reaction
30. Which best describes what happens in a chemical reaction?When bonds form, energy is absorbed

### Semester 2 exam: QR Challenge

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