# Lesson Notes By Weeks and Term - Senior Secondary 1

Solar energy

Term: 3rd Term

Week: 5

Class: Senior Secondary School 1

Age: 15 years

Duration: 40 minutes of 5 periods each

Date:

Subject:      Physics

Topic:-       Solar energy

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

1. Define solar energy
2. List and explain some solar collectors

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

 PRESENTATION TEACHER’S ACTIVITY STUDENT’S ACTIVITY STEP 1 INTRODUCTION The teacher reviews the previous lesson on the fluids at rest or in motion Students pay attention STEP 2 EXPLANATION He defines and explains solar energy Students pay attention and participates STEP 3 DEMONSTRATION He lists and explains some solar collectors Students pay attention and participate STEP 4 NOTE TAKING The teacher writes a summarized note on the board The students copy the note in their books

NOTE

SOLAR ENERGY

The sun core temperature is about 15 million degree centigrade, but its surface temperature is 60000C.

The energy is as a result of nuclear fusion of the hydrogen molecules.

SOLAR COLLECTOR

These are devices that are used to store solar energy or to convert solar energy to other forms of energy.

They are:

a) Flat plat collector: is a large shallow metal box typically mounted on a roof or a high stand. It is usually designed to operate in low temperature range starting from ambient or surrounding to 1000

b) Focusing Collector: The type of collector uses a concave reflector (mirrors or lens) to concentrate the solar beam. The intensity of the beam is raised from 2 to 10000 times.

APPLICATION OF SOLAR COLLECTOR

1. It is used where hot water is in high demand
2. It is used as source of heat in the evaporation of salt water
3. Heat source for electricity supply

EVALUATION:   1. Define Solar energy

1. List and explain some solar collectors

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively