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

### BASIC SCIENCE

BASIC SCIENCE AND TECHNOLOGY

THIRD TERM

WEEK 6

JSS 1 (Basic 1)

THEME: YOU AND ENERGY

PREVIOUS LESSON – Meaning/Definition of Space Travel | Purposes of Space Travel | Benefits of Space Travel | Dangers of Space Travel JSS 1 (Basic 7) – Basic Science

### LEARNING AREA

1. Introductory Activities

2. Definition of Gravitation and Weightlessness

3. Effects of Gravitation on Objects

4. Demonstration of the Effects of Gravitational and Weightlessness

5. Revision and Weekly Assessment (Test)

### PERFORMANCE OBJECTIVES

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

1. explain the meaning of gravitation and weightlessness.

2. state the effects of gravitation on objects.

### ENTRY BEHAVIOUR

The students know that when an object is thrown with the earth space, it is definitely coming down.

### INSTRUCTIONAL MATERIALS

The teacher will teach the lesson with the aid of:

1. Scale balance

2. Various objects

3. Writing materials

### 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 – Friction – Meaning, Uses, Advantages and Disadvantages of Friction (JSS 1)

Forces – Meaning and Types of Forces (JSS 1)

### LESSON 1 – INTRODUCTION

Gravity does exist everywhere in the universe but in the space, it does not exist.

Note – Make use of ball or other objects support the above statement or as stated in the lesson presentation.

### DEFINITION OF GRAVITATION AND WEIGHTLESSNESS

Gravitation is defined as the force that pull down an object with weight (mass) back to earth.

Or

Force that make everything that goes up to fall back down to earth.

For example, the force that brings down an orange from the orange tree, it is called gravitational force.

Weightlessness is defined as a condition that make an object with weight (mass) appear as without weight.

That’s, the state of being weightless.

In space, everything with weight floats.

### EFFECTS OF GRAVITATION ON OBJECTS

1. It causes falling of all objects.

2. It increases speed of falling objects.

3. It causes objects to move.

4. It makes exchange of gasses possible.

5. It supports life.

### ASSIGNMENT

Find out –

1. The components of the solar system.

2. discuss the following:

• night and day
• seasons of the year

3. explain the causes of the eclipse of the sun and the moon.

### 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;

2. Demonstrates the effect of gravitational pull on objects.

Student’s Activities – Carry out demonstrations on gravitation.

3. Leads students to demonstrate the effect of gravitation on objects.

Student’s Activities – Demonstrate the effect of gravitation on objects.

4. Guides class discussion on the effect of gratification.

5. Teacher’s/Student’s Activities – Carry out activities on weighing themselves and recording their individual weights.

### 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. define gravitational pull.

2. describe the effects of gravitation on stone, feather, book.

3. state where a person is likely to experience weightlessness.