# Lesson Notes By Weeks and Term - Senior Secondary 1

Measurement of mass, weight, and time

Term: 1st Term

Week: 3

Class: Senior Secondary School 1

Age: 15 years

Duration: 40 minutes of 5 periods each

Date:

Subject:      Physics

Topic:-       Measurement of Mass, weight and time

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

1. Define and differentiate mass and weight
2. Define time
3. Mention tools for measuring mass, weight and time

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

 PRESENTATION TEACHER’S ACTIVITY STUDENT’S ACTIVITY STEP 1 INTRODUCTION The teacher reviews the previous lesson on the measurement of distance Students pay attention STEP 2 EXPLANATION He defines and differentiates between mass and weight Students pay attention and participates STEP 3 DEMONSTRATION He defines time. He also mentions tools used for measuring mass, weight and time Students pay attention and participate STEP 4 NOTE TAKING The teacher writes a summarized note on the board The students copy the note in their books

NOTE

MEASUREMENT OF MASS, WEIGHT AND TIME

MEASUREMENT OF MASS AND WEIGHT

Mass can be defined as the quantity of matter that is contained in the body. Its unit is kilogram.

While weight is defined as the force exerted on a body when freely suspended in air. Its unit is in Newton.

Instruments used for measuring mass are:

1. Top pan balance.
2. Lever balance.

While the instrument for measuring weight is spring balance.

DIFFERENCES BETWEEN MASS AND WEIGHT

 S/N MASS WEIGHT 1 It is a Scalar quantity. It is a Vector quantity. 2 It is measured with Chemical balance. It is measured with Spring balance. 3 It is measured in Kilogram (Kg). It is measured in Newton (N). 4 It is Constant. It varies from point to point. 5 It is the quantity of matter in a body. It is the gravitational force exerted on a body when suspended in air

MEASUREMENT OF TIME

Time is the duration of an event and it is measured in seconds. Measurement of time works on the principle of constant oscillation

The instruments used in measuring time are:

1. Ticker-tape timer
2. Stop watch/clock
3. Sand- clock
4. Electric clock
5. Heart beat

EVALUATION:    1. Define mass and weight

1. State three differences between mass and weight
2. Give one examples each of a tool that can measure mass and weight
3. Define time
4. List three instruments that can be used to measure time

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively