This false-color image from a bubble chamber shows the tracks of subatomic particles at high speed.
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How is radiocarbon dating used to date objects?
The use of radioisotopes to date rocks and artifacts has helped scientists piece together a clearer picture of Earth's past. Use the library or Internet to learn more about an archaeological site that you have heard about in the news. Find out how the age of the site was determined. Digitally record a podcast about the site and the methods used by scientists to date the site and/or its artifacts. Post the podcast on your class Web site.
How do science concepts apply to your world? Here are some questions you'll be able to answer after you read this chapter.
Why is radon gas dangerous? (Section 10.1)
How can you measure the age of a rock? (Section 10.2)
How does a smoke detector work? (Section 10.3)
How can doctors diagnose certain types of cancer? (page 306)
How does a nuclear reactor generate electricity? (Section 10.4)