Heat and Temperature (Primary 5- Basic Technology Lesson Note: First Term, Week Eight)

Week Eight

Subject: Basic Technology
Class: Primary Five
Week of the Second Term: 8th Week
Topic: Heat and Temperature
Subtopic: Units and Symbols of Temperature (Degree Celsius and Degree Fahrenheit)

Objectives

At the end of the lesson, pupils should be able to:

1. Explain the difference between degrees Celsius (°C) and degrees Fahrenheit (°F) as units of temperature measurement.
2. Convert temperatures between degrees Celsius and degrees Fahrenheit using simple formulas.
3. Use the symbols for degrees Celsius (°C) and Fahrenheit (°F) correctly in written contexts.

Entry Behaviour

Pupils should already know the definitions of heat and temperature, as well as how thermometers measure temperature.

Instructional Materials

1. Textbook: “Foundations of Sci. & Tech for Primary School Book 5” by Chris Ijiyemi
2. Visual aids: Charts showing temperature scales and conversion formulas
3. Flashcards: Cards with temperature values in both Celsius and Fahrenheit for interactive activities

Reference Materials

• Ijiyemi, C. (2016). Foundations of Sci. & Tech for Primary School Book 5. Metropolitan Publishers, Lagos.
• Oyinlola, M., Rahaman, B., & Ezeume, I. (2015). Basic Science and Technology for Primary School Book 5 (Bec Edition). Spectrum Book Limited, Lagos.

Content

Units and Symbols of Temperature: Degree Celsius (°C) and Degree Fahrenheit (°F)

Temperature is a measure of how hot or cold an object is. The two most commonly used units for measuring temperature are degrees Celsius (°C) and degrees Fahrenheit (°F).

Degree Celsius (°C)

• What is it?
  The degree Celsius is a unit of temperature used in most countries around the world. It is based on the freezing and boiling points of water.
• Freezing and Boiling Points:
  • Water freezes at 0 degrees Celsius (0°C).
  • Water boils at 100 degrees Celsius (100°C).
• How to Use:
  You might see temperatures in Celsius on weather reports, in science classes, and in cooking. For example, a comfortable room temperature is usually around 20 to 22 degrees Celsius.

Degree Fahrenheit (°F)

• What is it?
  The degree Fahrenheit is another unit of temperature, primarily used in the United States. It has different freezing and boiling points compared to Celsius.
• Freezing and Boiling Points:
  • Water freezes at 32 degrees Fahrenheit (32°F).
  • Water boils at 212 degrees Fahrenheit (212°F).
• How to Use:
  You might see temperatures in Fahrenheit when checking the weather or cooking in the U.S. For example, a warm day might be around 75 degrees Fahrenheit.

Comparing Celsius and Fahrenheit

• Freezing Point of Water:
  • 0°C is equivalent to 32°F.
• Boiling Point of Water:
  • 100°C is equivalent to 212°F.
• Room Temperature:
  • Typically, 20-22°C is equivalent to 68-72°F.
• Body Temperature:
  • A normal body temperature is about 37°C, which is roughly 98.6°F.

Step 1: Introduction

Lesson Presentation (Step-by-Step Procedure)

Others removed.