Physics SS 2 Curriculum Guides – Energy Quantization and Duality of Matter (Molecular Theory of Matter)

THEME – ENERGY QUANTIZATION AND DUALITY OF MATTER

TOPIC – MOLECULAR THEORY OF MATTER

INSTRUCTIONAL MATERIALS

1. Use charts and drawings to illustrate the molecular theory

2. Use the bicycle pump and thermometer to demonstrate Boyle’s law and temperature or Boyles’s law apparatus

3. Glass tube, water and mercury

4. Naphthalene or (camphor), any perfume placed in one corner of the class and perceiving the odour at the other end of the class.

LEARNING OBJECTIVES

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

1. state the fundamental assumptions of the molecular theory.

2. use the molecular model to explain:

• pressure in a gas

• cohesion and adhesion

• diffusion.

CONTENTS OF THE LESSON

FOCUS LESSONS 

1. Fundamental assumptions of molecular theory

2. Pressure in a gas

3. Cohesion and adhesion

4. Diffusion.

LESSON PRESENTATION

TEACHER’S ACTIVITIES

The teacher,

1. use models to establish the fundamental assumptions of molecular theory of matter.

2. demonstrate that the pressure on a given mass of gas in a container is proportional to the number of molecules.

3. relate molecular explanation of pressure to Boyle’s law and temperature measurement.

4. use water and mercury to demonstrate adhesive and cohesive forces.

 

 

STUDENT’S ACTIVITIES

The students discuss and demonstrate diffusion of liquids and gases.

LESSON EVALUATION

Students to,

1. answer questions on molecular theory

2. use the molecular theory to explain:

• pressure in a gas

• cohesion

• adhesion

• diffusion.