# BASIC SCIENCE

BASIC SCIENCE AND TECHNOLOGY

THIRD TERM

WEEK 8 – Revolution of the Earth | The Eclipse of the Sun and the Moon | The Climate and the Seasons

JUNIOR SECONDARY SCHOOL (JSS 1)

THEME: YOU AND The ENVIRONMENT

PREVIOUS LESSON – Meaning/Definition of Gravitation and Weightlessness | Effects of Gravitation on Objects JSS 1 (Basic 7) – Basic Science

# TOPIC – THE EARTH IN SPACE

### LEARNING AREA

1. Introductory Activities

2. Rotation and Revolution of the Earth

3. The Eclipse of the Sun and the Moon

4. The Climate and the Seasons

5. Revision and Weekly Assessment (Test)

# PERFORMANCE OBJECTIVES

By the end of the lesson, most of the students should have attained the following objectives (cognitive, affective and psychomotor) and should be able to –

1. explain the rotation and revolution of the earth and the moon.

2. illustrate the eclipse of the sun and the moon.

3. explain the seasons of the year.

# ENTRY BEHAVIOUR

The students can state other planets other than the earth.

# INSTRUCTIONAL MATERIALS

The teacher will teach the lesson with the aid of:

1. Charts/diagrams of the solar system

2. Charts/models/diagram on rotation and revolution of the earth, moon and eclipse

3. Balls

4. Flash light

# METHOD OF TEACHING

Choose a suitable and appropriate methods for the lessons.

Note – Irrespective of choosing methods of teaching, always introduce an activities that will arouse pupil’s interest or lead them to the lessons.

# REFERENCE MATERIALS

1. Scheme of Work

2. 9 – Years Basic Education Curriculum

3. Course Book

4. All Relevant Material

5. Online Information

# LESSON 1 – INTRODUCTION

### ROTATION AND REVOLUTION OF THE EARTH

Rotation and revolution are the two types of earth’s movements. The Sun is the center of the Solar System and the major source of all life and energy here on Earth.

### ROTATION OF THE EARTH

Rotation can be defined as the movement of Earth around its own axis in every 24 hours. It takes the earth 24 hours to complete a rotation around its axis.

### EFFECTS OF EARTH’S ROTATION

1. It causes day and night.

2. It causes time difference.

3. It causes the direction of winds.

4. It causes ocean currents to be deflected.

# LESSON 2 – REVOLUTION OF THE EARTH

Revolution of the earth can be defined as the movement around the sun in every 365 days (or a leap year – 366 days) making one years.

It takes the earth 365 day (a year) to complete its movement around the sun.

### EFFECTS OF THE EARTH’S REVOLUTION

1. It causes different season. For example, the rainy (summer) and dry (winter) season.

2. It causes variation in the length of day and night.

3. It causes eclipse of the sun.

# LESSON 3 – DESCRIPTION OF ECLIPSE, CLIMATE AND SEASONS

### ECLIPSE OF THE SUN AND THE MOON

This is complete or partial darkness on the face of the earth. At this time, the earth is unable to receive light from the sun as a result of the moon (solar eclipse) coming in between the sun and earth or the earth (lunar eclipse) comes between the sun and the moon.

Eclipse of the Sun – Solar Eclipse – This is when the moon comes in between the sun and the earth.

Eclipse of the Moon – Lunar Eclipse  – This is when the earth comes in between the the sun and the moon.

### CLIMATE

Climate is the average weather conditions over a given period of time. It is the change in weather over a period of time or given place.

### SEASONS

Seasons are the period of the year marked by special climate conditions. There are four (4) major seasons, namely – the spring, summer, fall and winter.

A season is a period of the year that is distinguished by special climate conditions. The four seasons—spring, summer, fall, and winter—follow one another regularly. Each has its own light, temperature, and weather patterns that repeat yearly.

A season is a division of the year marked by changes in weather, ecology, and amount of daylight.

### ASSIGNMENT

Find out –

1. The meaning of satellite.

2. Three (3) examples of satellites.

# PRESENTATION

To deliver the lesson, the teacher adopts the following steps:

1. To introduce the lesson, the teacher revises the previous lesson. Based on this, he/she asks the students some questions; then, the teacher –

2. uses models/charts to explain the rotation and revolution of the earth and the moon.

Student’s Activities – Observe the illustrations.

3. Demonstrates eclipse of the sun using balls of different sizes and flash light.

Student’s Activities – Repeat the teacher’s demonstrations of the eclipses.

4. Leads discussion on seasons of the year.

Student’s Activities –

• Participate in the discussions on seasons of the year.
• Draw and label the solar system.

5. Summarizes the lesson on the board.

Student’s Activities – Copy as the teacher writes.

# CONCLUSION

To conclude the lesson for the week, the teacher revises the entire lesson and links it to the following week’s lesson.

# LESSON EVALUATION

1. Discuss the following:

a. night and day

b. seasons of the year.

2. Explain the causes of the eclipse of the sun and the moon.