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QR Challenge: Physical & Chemical Changes

Created using the ClassTools QR Treasure Hunt Generator

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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

3. Print out the QR codes.

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.

Questions / Answers (teacher reference)

Question

Answer

1. What is a physical changeoccurs when a substances appearance is changed
2. What is a chemical changea new substance is formed
3. A solid changing to a liquid is a physical or chemical changephysical
4. If an object sinks, describe the density of the objectgreater than 1.0g/mL
5. Calculate the density of a 60g object with a volume of 6mL10g/mL
6. What is formed when two liquids mix and form a solidprecipitate
7. Toast burning, physical or chemical changechemical
8. A change in the state of matter is a physical or chemical changephysical
9. Characteristics that can be observed without changing the identity of a substancephysical property
10. A change that alters the identity of a substance is what kind of changechemical
11. Pancakes cook is a physical or chemical changechemical
12. Mixing salt and pepper is a physical or chemical changephysical
13. A bicycle rusting is a physical or chemical changechemical
14. Chocolate syrup is dissolved in milk is a physical or chemical changephysical
15. Baking sode reaacts with vinegar by fizzing is a physical or chemical changechemical
16. Grass grows is a physical or chemical changephysical
17. Food is digested is a physical or chemical changechemical
18. A marshmallow is toasted over a campfire is a physical or chemical changephysical

 


Physical & Chemical Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_a_physical_change

Question 1 (of 18)

 


Physical & Chemical Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_a_chemical_change

Question 2 (of 18)

 


Physical & Chemical Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=A_solid_changing_to_a_liquid_is_a_physical_or_chemical_change

Question 3 (of 18)

 


Physical & Chemical Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=If_an_object_sinks,_describe_the_density_of_the_object

Question 4 (of 18)

 


Physical & Chemical Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Calculate_the_density_of_a_60g_object_with_a_volume_of_6mL

Question 5 (of 18)

 


Physical & Chemical Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_formed_when_two_liquids_mix_and_form_a_solid

Question 6 (of 18)

 


Physical & Chemical Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Toast_burning,_physical_or_chemical_change

Question 7 (of 18)

 


Physical & Chemical Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=A_change_in_the_state_of_matter_is_a_physical_or_chemical_change

Question 8 (of 18)

 


Physical & Chemical Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Characteristics_that_can_be_observed_without_changing_the_identity_of_a_substance

Question 9 (of 18)

 


Physical & Chemical Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=A_change_that_alters_the_identity_of_a_substance_is_what_kind_of_change

Question 10 (of 18)

 


Physical & Chemical Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Pancakes_cook_is_a_physical_or_chemical_change

Question 11 (of 18)

 


Physical & Chemical Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Mixing_salt_and_pepper_is_a_physical_or_chemical_change

Question 12 (of 18)

 


Physical & Chemical Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=A_bicycle_rusting_is_a_physical_or_chemical_change

Question 13 (of 18)

 


Physical & Chemical Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Chocolate_syrup_is_dissolved_in_milk_is_a_physical_or_chemical_change

Question 14 (of 18)

 


Physical & Chemical Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Baking_sode_reaacts_with_vinegar_by_fizzing_is_a_physical_or_chemical_change

Question 15 (of 18)

 


Physical & Chemical Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Grass_grows_is_a_physical_or_chemical_change

Question 16 (of 18)

 


Physical & Chemical Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=Food_is_digested_is_a_physical_or_chemical_change

Question 17 (of 18)

 


Physical & Chemical Changes: QR Challenge

https://www.classtools.net/QR/decode.php?text=A_marshmallow_is_toasted_over_a_campfire_is_a_physical_or_chemical_change

Question 18 (of 18)