Heat · SHS1 Physics

Lesson notes

Learning Objectives

Indicator: 1.2.1.LI.4 - Derive the relationship between the Celsius, Fahrenheit and the Kelvin scales.

By the end of the lesson, learners can:

State the lower fixed point, upper fixed point, and fundamental interval for the Celsius, Fahrenheit, and Kelvin scales.
Derive the linear relationship between the Celsius and Fahrenheit scales from the principle of equal ratios of fundamental intervals.
Derive the linear relationship between the Celsius and Kelvin scales using the concept of absolute zero.
Convert temperatures between all three scales using the derived formulas with correct units.
Apply the relationships to solve real-life temperature conversion problems involving local and international contexts.

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Curriculum details

Strand: Energy (Strand 2)
Sub-strand: Heat (2.1)
Content standard: 1.2.1.CS.1 - Demonstrate knowledge and understanding of principles of Thermometry 1.2.1.LO.1 Apply the principles of thermometry to design a thermometer.
Indicator: 1.2.1.LI.4 - Derive the relationship between the Celsius, Fahrenheit and the Kelvin scales.
Suggested placement: Semester 1, Week 16 (Week 16 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: NaCCA curriculum document, p. 48

Exemplars (from the NaCCA curriculum)

Talk for learning: Using the internet/reference books Let learners research to find the meaning of the following terms lower fixed point, upper fixed point, and fundamental interval.
- Let learners brainstorm to come out with materials and properties that are used to measure temperature.
- From the research let learners connect the lower fixed and upper fixed point of different scales to establish temperature relationship.
Encourage self-awareness and personal growth by fostering an environment where learners feel comfortable sharing their reflections and experiences.
Assessment (1.2.1.AS.4). The document marks these depth-of-knowledge levels for this indicator: Level 2 Skills of conceptual understanding.
Teaching and Learning Resources:
- Laboratory
- Beakers
- Water
- Heaters thermometers
- power sources
- Audio-visuals
- Internet
- Reference books
- Projectors
- Interactive
- YouTube virtual laboratory .