WASTES AND WASTE DISPOSAL

TITLE: LESSON NOTE ON BASIC SCIENCE AND TECHNOLOGY

SUBJECT: BASIC SCIENCE AND TECHNOLOGY

TERM: FIRST TERM

THEME: YOU AND THE ENVIRONMENT

WEEK: WEEK 10

CLASS: PRIMARY 5

NAME OF TEACHER:

DATE:

CLASS: PRIMARY

AGE OF STUDENTS:

CLASS COMPOSITION: Slow and fast learners.

PERIOD:

TIME: 40 MINUTES

TOPIC: WASTES AND WASTE DISPOSAL

PERFORMANCE OBJECTIVES

At the end of this lesson, Pupils should be able to:

explain what constitute waste;
Identify different types of waste.
Define waste disposal
mention methods of disposal of waste;
Know different ways of recycling waste.
Advantages of recycling waste.

TEACHING AND LEARNING MATERIALS

Waste bin
Waste paper basket
Broom
Dustpan
Whiteboard/Chalkboard
Explanatory posters/pictures showing Waste Disposal.
Explanatory videos on Waste disposal.

TEACHING AND LEARNING METHODS

Explanation
Discussion
Questions and answer

REFERENCE MATERIALS

NERDC Basic Education Curriculum for primary schools.
Universal Basic Education Curriculum for primary schools.
Lagos State Scheme of Work for Basic Science and Technology.
Unified Schemes of Work for Lagos State Primary Schools (MIDDLE BASIC)
Online Materials.
Edudelight Basic Science and Technology for Primary Schools.

ENTRY BEHAVIOUR/ PREVIOUS KNOWLEDGE: the students are familiar with Healthy Environment.

WORD FILE: materials,commercial, domestic.

LESSON CONTENT

WASTE AND WASTE DISPOSAL

Waste is any materials unused and rejected as worthless or unwanted from domestic, commercial and agricultural activities. Disposal of waste should always be done the right way for our health benefit.

Categories of Waste

Waste can be categories into three (3).

Liquid
Solid
Gaseous

Types of wastes

Waste is of two types. These are

Refuse
sewage

REFUSE

Refuse are unwanted solid materials found in our environment. They are thrown away because they are of no use to the person, offices, institutions that threw them away.

Examples of refuse: empty cans, broken bottles, pieces of wood, plastic containers, papers, food containers, polythene bags, old clothes (rags), food items. Sachet water, biscuit, peels of fruits. Sometimes this refuses are been decomposed by moulds and bacteria but some cannot be decomposed.

Any refuse that can be decomposed are called BIODEGRADABLE REFUSE while refuse that cannot be decomposed are called NON – BIODEGRADABLE REFUSE.

Examples of Biodegradable refuse are: food, fish, etc.

Examples of Non – Biodegradable refuse are: Polythene, cans, plastics.

SEWAGE

Sewage are liquid or semi –liquid wastes. Sewage waste matters from human and animal faeces, urine, release from factories and houses like waste water, mineral salt.Sewage wastes are very poisonous, it contains germs like worms, bacteria, protozoa, viruses.So, sewage should not be allowed to mix with tap water, wells, rivers and our food.

Sewage can be turned to fertilizer or manure if treated and well managed.Sewage Farm (Sewage treatment plant) is a place where sewage is treated.

WASTE DISPOSAL

Waste disposal is the way of keeping our waste (sewage and refuse) in a proper place so that it will not affect our environment. Wastes can be disposed by using disposal bin, disposal van, Disposal barrel, disposal pit.

Ways of disposing sewage waste

Water closet or discharge pipe should be linked to a soak away.
Pit latrine should be linked to a septic tank.

Ways of disposing Refuse waste

Use of dump bin to dumped refuse.
The use of incinerator.
Compositing method.
Land filling.

Recycling of waste

Recycling is the procedure of making a materials that has been used before to be useful again by going through some treatment.

Methods of recycling waste

Burning of pit to be used as manure
Use of incinerator

Advantages of Recycling

It keeps our environment clean.
It promote personal hygiene.
It is used to generate income.
It can be used as fertilizers after treatment.
It is cheap.
It provides jobs.

Dangers of poor Disposal of waste.

It cause germs
Emission of gaseous waste into the air can lead to serious illness.
It lead to pollution of the environment.
It could lead to erosion
It could destroy plant and animals
It could lead to serious respiratory problem.

INSTRUCTIONAL PROCEDURE.

The Teacher revises the previous lesson (Healthy Environment).
The Teacher introduces the lesson through question and answer (Waste disposal).
The Teacher explains the lessons.
The Teacher write the note on the board.

LEARNERS ACTIVITIES

Learners participate in the class discussion

LESSON EVALUATION

Teacher ask the learners to: