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
4. Cut them out and place them around your class / school.
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!
4. A detailed case study in how to set up a successful QR Scavenger Hunt using this tool can be found here.
Question | Answer |
| 1. 1. The change in matter in which chemical bonds are broken, rearranged, and reformed is called a _____. A) chemical formula B) chemical reaction C) chemical equation D) chemical compound | B | 2. 2. When a substance changes phase, the chemical structure of its molecules does not change. A) false B) true | B | 3. 3. Which example best describes a chemical change in matter? A) a newspaper being torn into pieces B) a car rusting C) an ice cream cone melting D) a cup of water freezing | B | 4. 4. Reactivity is a chemical property of matter. A) true B) false | A | 5. 5. Why are standardized units of measurement important? A) It's impossible to make any measurements without a standardized system. B) Having a common reference is important for communicating data. C) People do not make measurement errors if they use standardized units. D) Kings and queens insisted that measurements be based on their unique sizes | B | 6. 6. The metric system is a system of measurement used in science and throughout the world to measure matter. A) false B) true | B | 7. 7. Which word describes the unit of measurement for the energy that food contains?A) calorie B) gram C) pound D) milliliter | A | 8. 8. Reactivity is a chemical property of matter.A) false B) true | A | 9. 9. A piece of paper is able to burn. Therefore, paper has the property of _____. A) density B) texture C) flammability D) displacement | C | 10. 10. What is a key property of the alkaline-earth metals? A) They are unreactive. B) They react readily. C) They have one valence electron. D) They gain electrons from other elements. | B | 11. 11. Which of the following is NOT a mixture? A) table salt B) lemonade C) garden soil D) salad dressing | A | 12. 12. Which of the following is a heterogeneous mixture? A) paint B) milk C) toothpaste D) granite | D | 13. 13. You leave what appears to be a homogeneous mixture undisturbed on a counter. After several hours, you notice that solid particles have settled to the bottom of the container and the liquid is in a layer above them. This observation leads you to believe you have a _____.A) colloid B) alloy C) suspension D) solution | C | 14. 14. The smallest piece of matter that cannot be broken down is called _____. A) a compound B) an atom C) a chemical formula D) a pure substance | B | 15. 16. A way to describe the characteristics of matter using numbers and units is called _____.A) measurement B) observation C) enhancement D) classification | A | 16. 17. Unique properties of elements are determined by atomic structure.A) true B) false | A | 17. 19. Fluorine, a member of Group 17, has an atomic number of 9. How many valence electrons does it typically contain?A) 2 B) 7 C) 17 D) 9 | B | 18. 22. A compound that conducts electricity when dissolved in water is always classified as an ionic compound.A) true B) false | A | 19. 23. Calcium ions and chloride ions combine to form the stable ionic compound calcium chloride. If the calcium ion has an oxidation number of 2+, and the chloride ion has an oxidation number of 1–, which is the correct chemical formula for calcium chloride?A) CaCl B) CaCl2 C) Ca2Cl D) Ca2Cl2 | B | 20. 24. In both ionic and molecular bonds, the resulting compound is stabilized because _____.A) each atom’s inner electronic orbital is empty B) each atom shares electrons with the other C) one atom transfers electrons to the other D) each atom’s outer electronic orbital is full | D | 21. 25. Typically, an atom of an element in Period 4, Group 2 of the periodic table has electrons in how many energy levels?A) three B) four C) one D) two | B | 22. 26. Mendeleev's periodic table was unique in that it:A) was organized by atomic massB) considered how alike groups of elements were C) had the number of protons in order from low to high D) was in order of increasing electronegativity | A | 23. 27. How many valence electrons are there in an ion that has a stable charge of -3?A) 7 B) 3 C) 5 D) 8 | C | 24. 29. What did the grouping of elements in the periodic table into columns allow scientists to do?A) Look at trends in their reactivity.B) Predict new elements with similar properties.C) Make inferences about their comparative electronegativity.D) All of the above | D | 25. 31. Which of the following is NOT part of the electromagnetic spectrum?A) Infrared radiation B) Visible light C) Alpha particles D) Photons | C | 26. 32. What is the relationship between wavelength and frequency? A) As one increases, the other increases. B) As one decreases, the other decreases. C) As one increases, the other decreases. D) It depends on the speed of light | C | 27. 33. Which of the following is true about elements in the same group? A) They are the same size. B) They often react with the same elements. C) They have increasing valence electrons. D) They are not related to each other | B | 28. B) Group 2 - Alkaline Earth Metals C) Group 3 - Rare Earth Metals D) Group 8 - Noble Gases | C | 29. 35. How are the number of dots around the symbol in a Lewis Dot diagram determined? A) By its size. B) By its atomic number. C) By its mass. D) By its group number | D | 30. 43. The Pauli Exclusion Principle states that a maximum of two electrons can be in a single atomic orbital. Since the s orbital can hold two electrons and the p orbital can hold six, how many orbitals would be used to hold a total of 5 electrons?A) 3 B) 4 C) 5 D) 6 | A | 31. 47. Which of these is not a synonym?A) Shell B) Orbital C) Level D) Configuration | D | 32. A) Share all its electrons with the Hydrogen atoms. B) Share equally with the other atoms. C) Essentially have 8 valence electrons. D) Take the electrons away from Hydrogen to form an ionic bond | B |
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