Half-Life and Radiometric Dating
Students will calculate half-life and use it to determine the age of samples in radiometric dating.
Key Questions
- Explain the concept of half-life and its application in nuclear decay.
- Analyze how radiometric dating techniques are used to determine the age of ancient artifacts or geological formations.
- Construct calculations to determine the amount of radioactive isotope remaining after a given number of half-lives.
Common Core State Standards
About This Topic
Globalization and the 1990s covers the post-Cold War era of rapid technological change and economic integration. This topic examines the impact of the internet on daily life, the significance of trade agreements like NAFTA, and the emergence of the U.S. as the world's sole superpower. Students also analyze the domestic successes and scandals of the Clinton presidency and the growing debate over the costs and benefits of a globalized economy.
For 11th graders, this topic is essential for understanding the world they were born into and the origins of modern economic and social challenges. It highlights the shift toward a service and information-based economy. Students grasp these complex global and technological shifts faster through collaborative 'tech timelines' and structured debates on the impact of free trade on American workers.
Active Learning Ideas
Formal Debate: The NAFTA Legacy
Divide the class into supporters of free trade and representatives of American manufacturing workers. They debate whether NAFTA was a net positive for the U.S. economy or if it led to the 'hollowing out' of the American middle class.
Inquiry Circle: The Birth of the Digital Age
Small groups research the early days of the internet and the 'dot-com' boom. They must identify how the web changed a specific industry (e.g., retail, news, or entertainment) and the social impact of being 'constantly connected.'
Think-Pair-Share: The 'End of History'?
Students read about the optimism following the fall of the Soviet Union. They work in pairs to discuss whether the 1990s was a period of 'peace and prosperity' or if new global threats were already emerging.
Watch Out for These Misconceptions
Common MisconceptionGlobalization only means that we buy things from other countries.
What to Teach Instead
Globalization also involves the rapid flow of information, culture, and people, as well as the global nature of environmental and security challenges. A 'global connections' map helps students see the complexity of the modern world.
Common MisconceptionThe 1990s was a time of total political unity in the U.S.
What to Teach Instead
The decade saw intense 'culture wars' and extreme political polarization, culminating in the impeachment of Bill Clinton. Peer-led analysis of 1990s political rhetoric helps students see the roots of modern partisan division.
Suggested Methodologies
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Frequently Asked Questions
What is NAFTA?
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