# Measuring Objects

**BASIC SCIENCE**

**Basic 4**

**TOPIC:**Measuring Solid

Solid volume is “the amount of space occupied by a solid object”. The volume of solid is expressed as cubic units. The method to determine the volume of a solid object depends on the shape of the objects.

**PERFORMANCE OBJECTIVES**

By the end of the lesson, the pupils should have attained the following objectives (cognitive, affective and psychomotor):

- measure the volume of regular solids;
- measure the volume of irregular solids.

**ENTRY BEHAVIOR**

The pupils are required to already have learned…

**INSTRUCTIONAL MATERIALS**

The teacher will teach the lesson with the aid of objects in the classroom e.g. cupboard, school box, books, etc. Stone, water, metre rule, tape, rule, beakers, measuring cylinders.

**METHOD OF TEACHING**

**REFERENCE MATERIALS**

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**CONTENT OF**

**THE**

**LESSON**

**INTRODUCTION(MEANING)**

**MEASURING SOLID**

Solid volume is “the amount of space occupied by a solid object”. The volume of solid is expressed as cubic units. The method to determine the volume of a solid object depends on the shape of the objects.

That is:

- Volume of an irregular shape can be determined by using water displacement:

**volume of an irregular solid objects**= volume of object + water – volume of water (m3)

**MEASURING THE VOLUME OF OBJECTS**

**REGULAR SOLID OBJECTS**

Teacher’s/Pupil’s Activities Measuring the length, breadth and height of the following and record the values in the right. Find the volumes.

**IRREGULAR SOLID OBJECTS**

Teacher’s/Pupil’s Activities

To measure the volume of a small irregular solid, follow the steps below:

- Put some water in a measuring cup or cylinder.

- Read the volume and record it.

- Gently drop the object (i.e. irregular solid) into the liquid in the cylinder or cup.

- Read the new volume and record it.

- Substrate the first volume from the second volume.

**PRESENTATION**

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

- To introduce the lesson, the teacher revises the previous lesson. Based on this, he/she asks the pupils some questions;
- Provides pupils with meter rule, tape rule, etc.
- Pupil’s Activities – Measure and record the length and breadth of objects in metric units.
- Guides the pupils to determine the area of plane surface by direct measurement;
- Pupil’s Activities – work in group, use string or pieces of thread to trace the area of desk-top place the string on a metre rule and note the length of the thread or string.
- Guides the pupils to determine the areas of surfaces by computation (i.e. L x B = A cm2), etc.
- Determine the area (A) of their desk-top by computation and compare the results.

**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**

**Pupils to:**

- measure the length and breadth of objects and things;
- record measurements in metric units;
- use their measurements to compute the area of objects and things in the classroom.