Physics - Senior Secondary 3 - Physics in Technology

Physics in Technology

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Term: 1st Term

WEEK: 9
Class: Senior Secondary School 3
Age: 17 years
Duration: 40 minutes for each of 5 periods
Date:
Subject: Physics
Topic: Physics in Technology
Subtopics:

  • Constructing a battery
  • Electroplating

SPECIFIC OBJECTIVES:
By the end of the lesson, students should be able to:

  1. Understand how to construct a simple battery and its working principle.
  2. Understand the process of electroplating and its applications in technology.

INSTRUCTIONAL TECHNIQUES:

  • Demonstration
  • Hands-on activity: Constructing a battery and electroplating
  • Discussion using examples from technology

INSTRUCTIONAL MATERIALS:

  • Materials for constructing a simple battery (e.g., copper, zinc, lemon or salt solution)
  • Electroplating setup (electrolyte solution, anode and cathode materials)
  • Physics textbook
  • Whiteboard markers

INSTRUCTIONAL PROCEDURES
PERIOD 1-5

PRESENTATION

STEP 1: INTRODUCTION

  • The teacher asks students what they know about batteries and electroplating.
  • The teacher explains the importance of batteries and electroplating in modern technology.

STEP 2: EXPLANATION

  • The teacher explains how to construct a simple battery using two electrodes and an electrolyte.
  • The teacher explains the process of electroplating: depositing a thin layer of metal on an object using electric current.

STEP 3: DEMONSTRATION

  • The teacher demonstrates how to construct a simple battery and electroplate a metal object.
  • Students will be given materials to construct their batteries and electroplate items.

STEP 4: HANDS-ON ACTIVITY

  • Students construct a simple battery in groups using copper, zinc, and a lemon as the electrolyte.
  • Students also electroplate a metal object in a solution using the principles demonstrated.

STEP 5: NOTE TAKING

  • The teacher writes a summary note on the board.

NOTE

  • Battery Construction: A simple battery can be made using two different metals (copper and zinc) and an electrolyte (such as lemon juice).
  • Electroplating: Electroplating involves using electricity to deposit a layer of metal onto an object. This process is used in industries to coat items with a thin layer of metal for protection and aesthetic purposes.

EVALUATION

  1. Describe how to construct a simple battery.
  2. What is electroplating and how does it work?
  3. List two applications of electroplating in technology.

CLASSWORK:

  • Explain how batteries are used in everyday devices.
  • Write a step-by-step procedure on how to electroplate an object.

CONCLUSION:

  • Teacher reviews the students' work and gives feedback.

The importance of batteries and electroplating in technology is emphasized.