Term: 1st Term
WEEK: 4
Class: Senior Secondary School 3
Age: 17 years
Duration: 40 minutes for each of 5 periods
Date:
Subject: Physics
Topic: Nucleus
Subtopics:
- Radioactivity - natural and artificial
- Isotopes
- Radioactive elements
- Radioactive emission
- Half-Life and decay constant
SPECIFIC OBJECTIVES:
By the end of the lesson, students should be able to:
- Understand the concept of isotopes and radioactive elements.
- Identify different types of radioactive emissions.
- Explain the concept of half-life and decay constant.
- Understand the process of radioactivity and its natural and artificial forms.
- Calculate the half-life of a substance and understand its application in real-world scenarios.
INSTRUCTIONAL TECHNIQUES:
- Explanation
- Demonstration
- Questions and answers
- Hands-on activity: Radioactive decay simulation using dice
- Video clips on radioactivity and types of radioactive emissions
INSTRUCTIONAL MATERIALS:
- Radioactive decay simulation kit (or dice for simulation)
- Physics textbook
- Isotopes: Atoms of the same element with different numbers of neutrons.
- Radioactive Elements: Elements that emit radiation as their nuclei decay.
- Types of Radioactive Emissions: Alpha (α), Beta (β), and Gamma (γ).
- *Half-Life: The time it takes for half of the radioactive atoms in a sample to decay.
EVALUATION
- What is the difference between isotopes and radioactive elements?
- List the types of radioactive emissions and explain each.
- What is half-life, and how do you calculate it?
CLASSWORK:
- Calculate the half-life of a substance if its original quantity was 100g and after 2 days, 25g remains.
CONCLUSION
- The teacher will review answers, provide feedback, and emphasize the importance of understanding radioactivity in real-life applications.
The class will discuss the significance of isotopes in medicine and industry.
