QR Challenge: Heat and Temperature

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. You pick up a tray of ice cubes off of the countertop. The countertop underneath the tray feels colder than the rest of the counter. Which explanation do you think is the best? a. The cold has been transferred from the tray to the counter. b. There is no heat energy left in the counter beneath the tray. c. Some heat has been transferred from the counter to the tray. d. The heat beneath the tray moves away into other parts of the countertop.	c. Some heat has been transferred from the counter to the tray.
2. After cooking an egg in boiling water, you cool the egg by putting it into a bowl of cold water. Which of the following explains the egg’s cooling process? a. Temperature is transferred from the egg to the water.b. Cold moves from the water into the egg.c. Energy is transferred from the water to the egg.d. Energy is transferred from the egg to the water.	a. Temperature is transferred from the egg to the water.
3. As water in a freezer turns into ice, a. the water absorbs energy from the air in the freezer.b. the water absorbs the coldness from the air in the freezer. c. the freezer air absorbs heat from the water. d. the water neither absorbs nor releases energy	c. the freezer air absorbs heat from the water.
4. The temperature of a substance increases as A.the substance contracts.B.the substance’s volume decreases.C.the average kinetic energy of its particles increases.D. the substance’s mass increases.	C.the average kinetic energy of its particles increases.
5. An aluminum plate and a plastic plate have been in the freezer all night long. When you remove them the next morning,a. The plates have the same temperature.b. The plastic plate has a higher temperature.c. The plastic plate has a lower temperature. d. The aluminum plate has a lower temperature.	a. The plates have the same temperature.
6. The theoretical temperature at which all molecular motion stops or there is no more kinetic energy to transfer is called:A. Zero degrees Celsius B.Absolute Zero C.the freezing point D.the boiling point	A. Zero degrees
7. If the particles of two substances have the same average kinetic energy, then A. the substances are identical. B. the particles will not react chemically.C. the substances are equal amounts.D. the substances have equal temperatures.	D. the substances have equal temperatures.
8. Which of the following statements best explains why there is no change in temperature once thermal equilibrium between two objects in contact is reached? A.Heat can flow between two objects in contact. B.Heat does not flow between objects in contact at the same temperature. C.Heat does not flow spontaneously from a cooler object to a warmer object. D.Heat flows by conduction, convection, and radiation when the temperatures are the same	B.Heat does not flow between objects in contact at the same temperature.
9. The molecules in which of the following have the greatest average molecular kinetic energy? A.air in a person’s lungs B.ice cubes in a glass of iced tea C.raindrops collecting in a puddle D.water boiling in a pot on a stove	D.water boiling in a pot on a stove
10. A cup of tea with a temperature of 80°C is placed on a table in a 20°C room. What happens to the thermal energy and molecular motion of the tea when it is left on the table? A.The thermal energy increases and the molecules move faster. B.The thermal energy decreases and the molecules move faster. C.The thermal energy increases and the molecules move more slowly. D.The thermal energy decreases and the molecules move more slowly	D.The thermal energy decreases and the molecules move more slowly
11. Which of the following is NOT an example of matter? A. dog B. sunlight C. a star D. steam	B. sunlight
12. The liquid in a thermometer ___ and ___ when in contact with a temperature lower than room temperature. A. contract and rise B. contract and sink C. expand and rise D. expand and sink	B. contract and sink

 

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