Download Ch 10 Radioactivity Webquest

NAME ________________________________________________ DATE ________________
Radioactive Decay Webquest
What are the three particles that make up an atom?
1. _________________________________
2. _________________________________
3. _________________________________
Neutrons
http://www.chem4kids.com/files/atom_neutron.html
(google search chem4kids neutrons and click the first link)
4. Neutrons have a _________________________ charge.
5. Neutrons are very important to an atom’s _______________________________ properties.
6. How are isotopes created?
7. Usually, protons and neutrons are stuck together, what happens during radioactive
decay?
Click “next page on atoms” this will take you to the next listed link
Isotopes and Radioactive Decay http://www.chem4kids.com/files/atom_isotopes.html
(google search chem4kids isotopes and click the first link)
8. Atoms that are missing neutrons or have extra neutrons are called ___________________
9. When an atom loses particles, specifically neutrons, it is going through
____________________________ ___________________
10. Radioactive decay occurs _________________________, how do archaeologists use this kind
of information?
Radioactivity: Expect the Unexpected
http://ed.ted.com/lessons/radioactivity-expect-the-unexpected-steve-weatherall
(google search TedEd Radioactivity and click the first link)
Watch the video on radiation
Click “Think” on the right side of the page and answer the multiple choice questions ONLY.
11. _____
12. _____
13. _____
14. _____
15. _____
***BONUS*** - On a separate sheet of paper. Answer question #5 about exponential decay.
You must draw the graph to earn points.
Carbon Dating http://www.pbs.org/wgbh/nova/tech/radiocarbon-dating.html
(google search NOVA radiocarbon dating and click the first link, click LAUNCH INTERACTIVE)
12. How are carbon-12 and carbon-14’s atomic structures different from each other?
13. What happens to one of the neutrons in a carbon-14 nucleus?
14. What does the carbon-14 turn into? _________________________
15. What happens to stable carbon-12 as an organism dies?
16. To find the carbon date of something, scientists compare what two levels?
Click “Margins of Error”
17. Can objects over 50,000 – 60,000
years old be dated using carbon?
_________
18. What is the biggest challenge to
carbon dating?
19. Who has made the atmospheric levels
of carbon worse?
_______________________
20. How have they done this? (there should be 2 reasons listed)
Nuclear Fission, Fusion, and the Atom Bomb http://science.howstuffworks.com/nuclearbomb.htm
(google search how stuff works nuclear bombs, start on PAGE 3 of this article)
21. Name and describe the two processes that can be used to create an atom bomb.
22. What momentous question did scientists Bohr and Wheeler ask about the process of
nuclear fission?
Click to page 4
23. How long does it take for U-235 to naturally decay? How did scientists get around waiting
this long?
24. What was the element (#94) discovered
that could possibly be used as nuclear
fuel? ______________________
Click to page 9
25. The degree of damage from a nuclear
bomb depends on what?
26. List the four things that cause damage:
27. What happens at the hypocenter?
28. Describe nuclear winter and what would happen to earth. (summarize!)
Nuclear Power http://science.howstuffworks.com/nuclear-power.htm
(google search how stuff works nuclear power and click the first link)
29. Why does nuclear energy make people both hopeful and fearful?
30. Why did the partial nuclear meltdown in Japan occur?
Click to page 4
31. List some of the extra precautions taken on the outside of nuclear reactors.
Click to page 5
32. Identify one PRO and one CON of nuclear power. Which side do you agree with?
Click to page 6
33. Why can’t radioactivity be turned off with the flip of a switch?
Radiation Exposure http://www.jlab.org/div_dept/train/rad_guide/sources.html
(google search Jefferson lab radiation sources and click the first link, watch the video)
34. List three source of natural radiation.
35. Name one type of radiation found within the human body. __________________________
36. What is the annual average dose of radiation for someone who lives in the general
population? _________________
Sources of Radiation http://www.iflscience.com/chemistry/most-radioactive-places-earth
(google search ifl science most radioactive places and click the first link)
37. What does a Geiger counter measure? _______________________________________
38. If radiation is ionizing, what can it do?
39. What happened in New Mexico, U.S.A.?
40. Explain what happened to the desert sand in New Mexico and how it happened.
41. Why is there more radiation exposure when you are in a plane?
42. Staying in Chernobyl, near reactor 4, for an hour, would expose you to the same amount
of radiation you receive during a ___________________________________
43. What was done in both Chernobyl and Fukushima (the black trash bags) to reduce the
amount of radiation?
44. What is the most radioactive place on earth?
45. In one CT scan, a person receives ___________ years’ worth of background radiation.
46. People who engage in what activity will receive the most radiation? ___________________