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QR Challenge: Review for Chemistry Post Test

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. 1 What is the number representing the strongest base on the pH scale?14
2. 2.What is the number representing the strongest acid on the pH scale?6
3. 3.What is the range of the pH scale?14
4. 4.What number on the pH scale represents neutral substances?7
5. 5.How would you neutralize an acid?add a base
6. 6.How would you neutralize a base?add an acid
7. 7.How would you dilute an acid or base?add water
8. 8.Write the definition for an independent variable.Sample answer-what I change or manipulate in the experiment
9. 9.Write the definition for a dependent variable.Sample answer-What I measure to see a difference in the experiment
10. 10.What is the difference between neutralization and dilution?Dilution is adding water, neutralization is adding a base or an acid.
11. 11.How would you change an acid's pH to neutral? (Hint: There are two ways.)Could dilute or neutralize
12. 12.What two words must be included in a hypothesis?if and then
13. 13.Draw the pH scale. Label the location of the: Strongest acid, Weakest acid,Strongest base, Weakest base, Neutral
14. 14.List 3 abiotic and 3 biotic elements of a freshwater ecosystem.Answers will vary.
15. 15.Explain your recommendation for solving the simulated chemical spill at the Saluda River. Give supporting details.Sample answer - I would contact the officials at the Lake Murray Dam and recommend that they release more water into the Saluda River. By doing this, the pH of the Saluda River would become more neutral. More water should be continually added until the pH of the river would reach 7 or close to 7. The solution to this pollution is dilution.
16. 16.When constructing a line graph with the results of your experiment, how do you know where the dependent and independent variable should be placed on the axes of the graph?DRY MIX- Give the words in the acronym.
17. 17.You are going to construct an experiment on the following question: Is lemon juice conducive (helpful or favorable) to plant growth? What is an appropriate hypothesis for the experiment?Sample answer -If I add lemon juice to a plant than it will not grow as well as a plant that receives water.
18. 18.In the lemon juice experiment, what is the independent variable?Amount/Type of solution added to the plants
19. 19.What is the dependent variable in the lemon juice experiment?Height of the plant or Growth of the plant
20. 20.What are the controls in the lemon juice experiment?Same type of plant, pot, soil, and location AND Same amount of sunlight and air
21. 21.Write the specific steps of the lemon juice experiment in order. Number each step.See teacher sample.

 


Review for Chemistry Post Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=1_What_is_the_number_representing_the_strongest_base_on_the_pH_scale?

Question 1 (of 21)

 


Review for Chemistry Post Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=2.What_is_the_number_representing_the_strongest_acid_on_the_pH_scale?

Question 2 (of 21)

 


Review for Chemistry Post Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=3.What_is_the_range_of_the_pH_scale?

Question 3 (of 21)

 


Review for Chemistry Post Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=4.What_number_on_the_pH_scale_represents_neutral_substances?

Question 4 (of 21)

 


Review for Chemistry Post Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=5.How_would_you_neutralize_an_acid?

Question 5 (of 21)

 


Review for Chemistry Post Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=6.How_would_you_neutralize_a_base?

Question 6 (of 21)

 


Review for Chemistry Post Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=7.How_would_you_dilute_an_acid_or_base?

Question 7 (of 21)

 


Review for Chemistry Post Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=8.Write_the_definition_for_an_independent_variable.

Question 8 (of 21)

 


Review for Chemistry Post Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=9.Write_the_definition_for_a_dependent_variable.

Question 9 (of 21)

 


Review for Chemistry Post Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=10.What_is_the_difference_between_neutralization_and_dilution?

Question 10 (of 21)

 


Review for Chemistry Post Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=11.How_would_you_change_an_acid's_pH_to_neutral?_(Hint:__There_are_two_ways.)

Question 11 (of 21)

 


Review for Chemistry Post Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=12.What_two_words_must_be_included_in_a_hypothesis?

Question 12 (of 21)

 


Review for Chemistry Post Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=13.Draw_the_pH_scale.__Label_the_location_of_the:_Strongest_acid,_Weakest_acid,Strongest_base,_Weakest_base,_Neutral

Question 13 (of 21)

 


Review for Chemistry Post Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=14.List_3_abiotic_and_3_biotic_elements_of_a_freshwater_ecosystem.

Question 14 (of 21)

 


Review for Chemistry Post Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=15.Explain_your_recommendation_for_solving_the_simulated_chemical_spill_at_the_Saluda_River.__Give_supporting_details.

Question 15 (of 21)

 


Review for Chemistry Post Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=16.When_constructing_a_line_graph_with_the_results_of_your_experiment,_how_do_you_know_where_the_dependent_and_independent_variable_should_be_placed_on_the_axes_of_the_graph?

Question 16 (of 21)

 


Review for Chemistry Post Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=17.You_are_going_to_construct_an__experiment_on_the_following_question:_Is_lemon_juice_conducive_(helpful_or_favorable)_to_plant_growth?_What_is_an_appropriate_hypothesis_for_the_experiment?

Question 17 (of 21)

 


Review for Chemistry Post Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=18.In_the_lemon_juice_experiment,__what_is_the_independent_variable?

Question 18 (of 21)

 


Review for Chemistry Post Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=19.What_is_the_dependent_variable_in_the_lemon_juice_experiment?

Question 19 (of 21)

 


Review for Chemistry Post Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=20.What_are_the_controls_in_the_lemon_juice_experiment?

Question 20 (of 21)

 


Review for Chemistry Post Test: QR Challenge

https://www.classtools.net/QR/decode.php?text=21.Write_the_specific_steps_of_the_lemon_juice_experiment_in_order._Number_each_step.

Question 21 (of 21)