Primary Four Second Term Basic Science Lesson Note

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BST SECOND TERM E NOTE FOR BASIC FOUR

Class:- Basic 4

Subject:- Basis science 

Week:- 2

Topic:  Composition of soil

Behavioral objective:- By the end of the lesson, the pupils should have attained the following objectives (cognitive, affective and psychomotor) and should be able to

1. Define soil
2. State the kind of soil
3. Explain the properties of soil

Instructional material/Reference material:-  Learn Africa Basic Science UBE edition for primary school book 4, picture, chart.

Building Background /connection to prior knowledge: Students have learnt that soil is the top most layer of the earth on which they live.

CONTENT

The composition of soil

Soil is made up of particles of different sizes. Besides soil particles, there are many other things in the soil. All plants grow in the soil, and their roots are inside the soil. Some animals live in the soil but, from time to time, they come to the surface. When plants and animals die, their dead bodies remain in the soil where they become rotten and later form part of the soil as humus. Let us find out more about things in the soil.

Things in the soil

Many living things can be found in the soil. Some animals like earthworms and termites can only live inside the soil. Living plants and animals are not the only things in the soil. The soil also contains parts of dead plants and animals.

Types of soil

There are three main types of soil and these are:-

1. Loamy soil
2. Sandy soil
3. Clayey soil

Air in the soil

Soil particles have spaces between them. As you probably know, what is in these spaces is air.

Properties of soils

We have found out that soil is made up of particles of different sizes. Some are large and some are small. We will now learn more about soil particles and how soils are different in the way they allow water to pass through them

Soil particles

We can find out about the different particles of soil if we shake up the mixture of soil in water and allow this soil and water mixture to settle down

Assessment & Evaluation:

1. Define soil
2. State the kinds of soil
3. Explain soil properties

WRAP UP (CONCLUSION) Teacher goes over the topic once again for better understanding.

Assignment:

Where can we find soil particles?

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