Class: Senior Secondary School 1 (SS1, SS 1, SSS1, SSS 1)
Term: 1st Term
Week: 2
Age: 15 years
Duration: 45 minutes
Subject: Physics
Curriculum Theme: Physics
Previous Lesson: Introduction to Physics.
Topic: POSITION, DISTANCE, AND DISPLACEMENT
Subject Matter: Measurement of distance using meter rule, vernier caliper and micrometer screw gauge, concept of direction and compass bearing, concept of position and position coordinates, locating objects using rectangular coordinate axes, distinguishing distance and displacement in simple situations

Specific Objectives

By the end of the lesson, pupils should be able to:

Cognitive Domain:

Define position, distance, and displacement.
Distinguish between distance and displacement.
Identify instruments used for measuring distance.
Describe how to use rectangular coordinate axes to locate objects.

Affective Domain:

Appreciate the importance of accurate measurements in physics.
Demonstrate carefulness when handling measuring instruments.
Show interest in understanding direction and position concepts.

Psychomotor Domain:

Measure lengths accurately using a meter rule, vernier caliper, and micrometer screw gauge.
Determine directions using a compass bearing.
Plot points on rectangular coordinate axes to represent position.

Collaborate with peers during practical measurement activities.
Communicate their understanding of position, distance, and displacement to others.

Reference Materials

The following resources were used in planning this lesson:

9 Years Basic Education Curriculum for Physics.
State Unified Scheme of Work for Senior Secondary School Physics.
New School Physics by P.N. Okeke and Anyakoha.
https://nigerianinfopedia.com.ng/physics-ss1-first-term-scheme-of-work/
https://www.studywithjumi.com/lesson-note-for-ss1-physics-first-term-week-2

Instructional Materials

The teacher will teach this lesson with the aid of:

Meter rule
Vernier caliper
Micrometer screw gauge
Magnetic compass
Graph sheets
Charts showing coordinate axes and examples of distance vs. displacement

Rationale for the Lesson

This lesson helps pupils understand how to describe the location and movement of objects accurately. It enables them to use common measuring instruments and apply concepts of direction and coordinates, which are important for daily life and further studies in science.

Prerequisite/Previous Knowledge

Pupils have basic knowledge of measurement, straight lines, and simple numerical representation from Junior Secondary School Mathematics and Integrated Science.

Lesson Content/Board Summary

POSITION, DISTANCE, AND DISPLACEMENT

1. Measurement of Distance

Distance is the total path length covered by an object in motion. It is a scalar quantity, meaning it only has magnitude.

Common instruments used for measuring distance include:

Meter Rule: Used for measuring lengths up to 1 meter. It measures to the nearest millimeter (0.1 cm).
Vernier Caliper: Used for more precise measurements of internal and external dimensions, and depth. It measures to the nearest 0.01 cm (0.1 mm).
Micrometer Screw Gauge: Used for very small and precise measurements, such as the thickness of a wire or paper. It measures to the nearest 0.001 cm (0.01 mm).

2. Concept of Direction and Compass Bearing

Direction specifies the orientation of an object or movement relative to a reference point. It is essential for describing position and displacement.

Compass Bearing: This is a way of expressing direction using a magnetic compass. Directions are typically given as angles measured clockwise from the North pole (0° or 360°). The cardinal points are North (N), East (E), South (S), West (W).

3. Concept of Position and Position Coordinates

Position: This refers to the location of an object relative to a reference point or origin. It is a vector quantity.

Position Coordinates: These are a set of values that specify the exact location of a point in space. In two dimensions, these are commonly (x, y) coordinates.

4. Locating Objects using Rectangular Coordinate Axes

Rectangular coordinate axes (Cartesian coordinates) use two perpendicular number lines (x-axis and y-axis) that intersect at an origin (0,0). An object’s position is given by an ordered pair (x, y).

To locate an object at (x, y):

Start at the origin (0,0).
Move ‘x’ units horizontally along the x-axis (right for positive x, left for negative x).
From that point, move ‘y’ units vertically along the y-axis (up for positive y, down for negative y).

5. Distinguishing Distance and Displacement

Distance:

It is the total length of the path covered by a moving object.
It is a scalar quantity (only magnitude).
It is always positive or zero.
It depends on the actual path taken.

Displacement:

It is the shortest distance between the initial and final positions of an object, along with the direction.
It is a vector quantity (magnitude and direction).
It can be positive, negative, or zero.
It only depends on the initial and final positions, not the path taken.

Example: If a person walks 5m East and then 5m West back to the starting point:

Distance covered = 5m + 5m = 10m.
Displacement = 0m (because the final position is the same as the initial position).

Teaching Methods/Instructional Techniques

Discussion, Lecture, Demonstration, Question and Answer, Visual Aids

Instructional Procedures

Step 1: Introduction

Time: 5 minutes
Teaching Skill: Set Induction
Teacher’s Activity: The teacher greets the pupils and asks them to recall what they understand by ‘measurement’ and ‘length’. The teacher then introduces the topic by asking how they would describe their position in the classroom or the distance from the school gate to their classroom.
Pupils’ Activity: Pupils respond to the questions and share their ideas on measurement and describing location.
Learning Point: Pupils recall prior knowledge and are prepared for the new topic.

Step 2: Measurement of Distance using Instruments

Time: 10 minutes
Teaching Skill: Demonstration/Explanation
Teacher’s Activity: The teacher defines distance and explains its scalar nature. The teacher then demonstrates how to use the meter rule, vernier caliper, and micrometer screw gauge to measure different lengths, explaining the precision of each instrument. Pupils are guided on how to read the measurements.
Pupils’ Activity: Pupils observe the demonstrations, ask questions, and practice reading measurements from the instruments.
Learning Point: Pupils learn how to measure distance accurately using various instruments.

Step 3: Concept of Direction and Compass Bearing

Time: 5 minutes
Teaching Skill: Explanation/Demonstration
Teacher’s Activity: The teacher explains the concept of direction and its importance. The teacher then demonstrates how a magnetic compass works and explains compass bearing, showing how to determine cardinal points and intermediate directions.
Pupils’ Activity: Pupils listen, observe the compass demonstration, and practice identifying directions.
Learning Point: Pupils understand the concept of direction and how to use a compass.

Step 4: Concept of Position and Position Coordinates

Time: 5 minutes
Teaching Skill: Explanation/Illustration
Teacher’s Activity: The teacher defines position and explains that it requires a reference point. The teacher then introduces position coordinates (e.g., x, y) as a way to specify location, using simple diagrams on the board.
Pupils’ Activity: Pupils listen, take notes, and ask questions for clarity on position and coordinates.
Learning Point: Pupils grasp the definition of position and the idea of using coordinates to specify it.

Step 5: Locating Objects using Rectangular Coordinate Axes

Time: 5 minutes
Teaching Skill: Guided Practice
Teacher’s Activity: The teacher draws rectangular coordinate axes on the board and demonstrates how to plot various points (positions). The teacher then gives pupils graph sheets and asks them to practice plotting points and identifying the coordinates of given points.
Pupils’ Activity: Pupils actively plot points on their graph sheets and identify coordinates under the teacher’s guidance.
Learning Point: Pupils develop the skill of locating objects using coordinate axes.

Step 6: Distinguishing Distance and Displacement

Time: 5 minutes
Teaching Skill: Explanation/Comparison
Teacher’s Activity: The teacher defines displacement as a vector quantity and clearly distinguishes it from distance using practical examples (e.g., walking around a block vs. straight line from start to end, or a car journey). The teacher emphasizes that displacement includes direction.
Pupils’ Activity: Pupils listen, ask questions, and contribute examples to differentiate between distance and displacement.
Learning Point: Pupils understand the difference between distance and displacement, recognizing their scalar and vector natures.

Step 7: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

Teacher’s Activity: The teacher evaluates the learning by asking the following questions:

Define distance and displacement.
List two instruments used to measure distance and state their precision.
State one key difference between distance and displacement.
How can you locate an object using rectangular coordinate axes?

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Pupils demonstrate understanding of the lesson.

Step 8: Conclusion

Time: 5 minutes
Teaching Skill: Summarization
Teacher’s Activity: The teacher summarizes the main points of the lesson, reiterating the definitions of position, distance, and displacement, the instruments for measurement, and the use of coordinates and direction. The teacher assigns homework: Ask pupils to measure the length and width of their physics textbook using a meter rule and a vernier caliper.
Pupils’ Activity: Pupils listen to the summary and copy down the homework assignment.
Learning Point: Pupils consolidate their learning and are given tasks to reinforce understanding.

Lesson Keywords

Position – The location of an object relative to a reference point.
Distance – The total path length covered by an object; a scalar quantity.
Displacement – The shortest straight-line distance from an initial to a final position, including direction; a vector quantity.
Meter Rule – A measuring instrument for lengths up to 1 meter, precise to 0.1 cm.
Vernier Caliper – A precision instrument for measuring internal/external dimensions and depth, precise to 0.01 cm.
Micrometer Screw Gauge – A high-precision instrument for measuring very small lengths, precise to 0.001 cm.
Direction – The line along which something is moving or pointing.
Compass Bearing – A method of expressing direction using angles measured clockwise from North.
Coordinates – A set of values (e.g., x, y) that specify a point’s exact location.

Differentiation

For pupils who grasp concepts quickly, the teacher will provide more complex problems involving calculations of displacement for multi-step movements. For pupils needing more support, the teacher will provide additional guided practice on plotting points and using measuring instruments, focusing on one concept at a time.

Note for teachers using this lesson plan

Ensure all measuring instruments are in good working condition and readily available for practical demonstration and pupil use. Emphasize safety precautions when handling instruments. Encourage active participation and group work during the practical sessions.