# 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. 1. What phase of matter has particles that can slide back and forth past each other, and fill up the bottom of a container?Liquid
2. 2. What happens to the phase of liquid neon if you cool it enough?It freezes
3. 3. Is sugar water a heterogeneous or homogenous mixture?Heterogeneous
4. 4. Is carbon dioxide an element or a compound?Compound
5. 5. Is carbon an element or a compound?Element
6. 6. What happens to the density of a sample if you increase the mass of that sample?The density increases
7. 7. If 200 grams of liquid occupy a space of 45 mL, what is its density?4.44 g/mL
8. 8. What is the density of a square object that has a mass of 5 g and each side 2cm?0.625 g/cm3
9. 9. Would an object that has a density of 1.5 g/mL float or sink in water?Sink
10. 10. Would a block of silver, that has a density of 10.5 g/mL, float or sink in liquid mercury that has a density of 13.5 g/mL?Float
11. 11. What happens to the speed of particles when you freeze the sample?They slow down.
12. 12. What happens to the speed of particles when they sublimate?They speed up.
13. 13. What is the name of the phase change when a gas turns directly into a solid?Deposition.
14. 14. Which of the three common phases of matter does not have a set volume?Gas
15. 15. Which phase of matter has a set volume and a constant shape?Solid

### 7th Chemistry Study Guide: QR Challenge

https://www.classtools.net/QR/decode.php?text=7th Chemistry Study Guide
Q1/15:

1. What phase of matter has particles that can slide back and forth past each other, and fill up the bottom of a container?&choe=UTF-8

Question 1 (of 15)

### 7th Chemistry Study Guide: QR Challenge

https://www.classtools.net/QR/decode.php?text=7th Chemistry Study Guide
Q2/15:

2. What happens to the phase of liquid neon if you cool it enough?&choe=UTF-8

Question 2 (of 15)

### 7th Chemistry Study Guide: QR Challenge

https://www.classtools.net/QR/decode.php?text=7th Chemistry Study Guide
Q3/15:

3. Is sugar water a heterogeneous or homogenous mixture?&choe=UTF-8

Question 3 (of 15)

### 7th Chemistry Study Guide: QR Challenge

https://www.classtools.net/QR/decode.php?text=7th Chemistry Study Guide
Q4/15:

4. Is carbon dioxide an element or a compound?&choe=UTF-8

Question 4 (of 15)

### 7th Chemistry Study Guide: QR Challenge

https://www.classtools.net/QR/decode.php?text=7th Chemistry Study Guide
Q5/15:

5. Is carbon an element or a compound?&choe=UTF-8

Question 5 (of 15)

### 7th Chemistry Study Guide: QR Challenge

https://www.classtools.net/QR/decode.php?text=7th Chemistry Study Guide
Q6/15:

6. What happens to the density of a sample if you increase the mass of that sample?&choe=UTF-8

Question 6 (of 15)

### 7th Chemistry Study Guide: QR Challenge

https://www.classtools.net/QR/decode.php?text=7th Chemistry Study Guide
Q7/15:

7. If 200 grams of liquid occupy a space of 45 mL, what is its density?&choe=UTF-8

Question 7 (of 15)

### 7th Chemistry Study Guide: QR Challenge

https://www.classtools.net/QR/decode.php?text=7th Chemistry Study Guide
Q8/15:

8. What is the density of a square object that has a mass of 5 g and each side 2cm?&choe=UTF-8

Question 8 (of 15)

### 7th Chemistry Study Guide: QR Challenge

https://www.classtools.net/QR/decode.php?text=7th Chemistry Study Guide
Q9/15:

9. Would an object that has a density of 1.5 g/mL float or sink in water?&choe=UTF-8

Question 9 (of 15)

### 7th Chemistry Study Guide: QR Challenge

https://www.classtools.net/QR/decode.php?text=7th Chemistry Study Guide
Q10/15:

10. Would a block of silver, that has a density of 10.5 g/mL, float or sink in liquid mercury that has a density of 13.5 g/mL?&choe=UTF-8

Question 10 (of 15)

### 7th Chemistry Study Guide: QR Challenge

https://www.classtools.net/QR/decode.php?text=7th Chemistry Study Guide
Q11/15:

11. What happens to the speed of particles when you freeze the sample?&choe=UTF-8

Question 11 (of 15)

### 7th Chemistry Study Guide: QR Challenge

https://www.classtools.net/QR/decode.php?text=7th Chemistry Study Guide
Q12/15:

12. What happens to the speed of particles when they sublimate?&choe=UTF-8

Question 12 (of 15)

### 7th Chemistry Study Guide: QR Challenge

https://www.classtools.net/QR/decode.php?text=7th Chemistry Study Guide
Q13/15:

13. What is the name of the phase change when a gas turns directly into a solid?&choe=UTF-8

Question 13 (of 15)

### 7th Chemistry Study Guide: QR Challenge

https://www.classtools.net/QR/decode.php?text=7th Chemistry Study Guide
Q14/15:

14. Which of the three common phases of matter does not have a set volume?&choe=UTF-8

Question 14 (of 15)

### 7th Chemistry Study Guide: QR Challenge

https://www.classtools.net/QR/decode.php?text=7th Chemistry Study Guide
Q15/15:

15. Which phase of matter has a set volume and a constant shape?&choe=UTF-8

Question 15 (of 15)