QR Challenge: Earth's history 7Sci ch 4

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.

---

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. fossils	the preserved remains or traces of organisms that lived in the past
2. petrified fossil2	a fossil formed when minerals replace all or part of an organism2
3. extinct3	A type of organism that no longer exists on Earth is said to be _____________3
4. relative age4	age compared with the ages of other rocks4
5. Intrusion5	_____________ igneous rock is always younger in relation to the sedimentary rock layers which it passes5
6. half-life6	The time it takes for half of the radioactive atoms in a sample of a radioactive element to decay is the element's _________6
7. radioactive decay7	occurs when atoms of some elements break down to form atoms of another element7
8. absolute age6	Geologists use radioactive dating to determine the _________ of rock8
9. uniformitarianiam9	What principle states that the geologic processes that change Earth today also changed Earth in the past?9
10. trace fossils10	Footprints and trails are examples of _____________________10
11. geologic time scale	Geologists divide Earth's long history into smaller units that make up the _________
12. carbon film	Plant leaves may form a fossil called a __________, a thin layer of carbon on rock.
13. unconformity	A gap in the geologic record where some rock layers have been lost because of erosion is _____________
14. Index	_________ fossils are helpful to geologists because they reveal the relative ages of the rock layers in which they occur.
15. Paleontologists	scientists who study fossils
16. mold	a hollow area in sediment in the shape of an organism or part of an organism
17. cast	a solid copy of the shape of an organism
18. evolution	the change in living things over time
19. law of superposition	According to the ________________, in undisturbed horizontal sedimentary rock layers the oldest is at the bottom. Each higher layer is younger than the layers below it.
20. extrusion	Lava that hardens on the surface and forms igneous rock
21. fault	a break in Earth's crust
22. era	One of the three long units of geological time between the Precambrian and the present
23. period	One of the units of geologic time into which geologists divide eras

 

---