QR Challenge: QR Code Challege-Chemistry

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. 1) Physical or Chemical change: Frost forming on grass	physical
2. 2) Matter is anything that has __________ and takes up __________.	mass, space
3. 3) Physical or Chemical change: Popping popcorn in the microwave	chemical
4. 4) True or False: Mass is the amount of matter in an object	True
5. 5) Physical or Chemical change: Sharpening a pencil	physical
6. 6) Physical or Chemical change: An apple rotting on the counter	chemical
7. 7) What is the difference between a heterogeneous mixture and a homogeneous mixture?	in a heterogeneous mixture, the parts are noticeably different from one another and in a homogeneous mixture the substances are so evenly distributed that it is difficult to distinguish one substance from another
8. 8) What are the two types of mixtures?	heterogeneous and homogeneous
9. 9) Circle the best answer: NaCl, CO2, and NaHCO3 are all examples of ELEMENTS or COMPOUNDS.	compounds
10. 10) True or False: Gold is a pure substance.	True
11. 11) Decomposing, rusting, exploding, and burning are indicators that a __________ change has occurred.	chemical
12. 12) Bending, tearing, mixing, and dividing are indicators that a _________ change has occurred.	physical
13. 13) What is the definition of a physical change?	a change that occurs without changing the identity of a substance
14. 14) What is the definition of a chemical change?	A change that occurs when one or more substances change into entirely new substances with different properties
15. 15) Name the three phases of matter	solid, liquid, gas

 

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