First Term Lesson Note for Week Two
Class: Basic 3 /Primary 3 / Grade 3
Subject: Basic Science
Topic: Measurement of Mass
Duration: 40 minutes
Period: Single Period
Reference Book:
- Stan Basic Science and Technology for Primary Schools, Book 3.
- Lagos State Unified Schemes of Work for Primary Schools (Primary 1 – 3)
- Online Resources
Instructional Material: Chart showing instruments for measuring mass
Behavioural Objectives: By the end of the lesson, learners will be able to:
i. Explain the meaning of mass
ii. Identify and state the unit of mass
iii. Mention the instruments for measuring weight.
Content:
Weight is the force of gravity on an object. The weight of an object shows how heavy or light an object is.
The instruments used for measuring the weight of objects include:
i. Spring balance
ii. Bathroom scale
iii. Chemical balance
iv. Beam balance
v. Kitchen scale
Mass is the amount of matter found in an object. The unit of Mass is grams.
Other unit of mass for heavy and larger objects are kilograms or Tonnes.
Metric Unit of Measure of Mass and Weight.
10 milligrams (mg) = 1 centigram (cg)
10 centigrams (cg) = 1 decigram (dg)
10 decigrams (dg) = 1 grams (g)
1000 grams (g) = 1 kilogram (kg)
1000 kilograms (kg) = 1 Tonne (T)
Presentation Step: The teacher presents the lesson in the following steps:
Step 1: The teacher revises the previous topic with the learners by asking the questions
Step 2: He/ she introduces the new topic by defining weight and mass.
Step 3: The teacher then asks the learners to mention the instruments for measuring weight.
Step 4: He/ she then explains mass and the unit of measuring mass.
Step 5: State the differences between mass and weight.
Evaluation: Answer the following questions.
1. __________ is the amount of matter found in an object. (a) Time (b) Length (c) Mass
2. The unit of mass is _________________. (a) seconds (b) grams (c) metres
3. Define weight
______________________________________________________________________________________
4. Mention two instruments for measuring weight
i. ______________________________________
ii. ______________________________________
5. Differentiate between mass and weight.
______________________________________________________________________________________
Conclusion: At the end of the lesson, learners were able to answer the questions correctly
Assignment:
1. What is mass?
______________________________________________________________________________________
2. The unit of Mass is ____________________ or _________________________.
3. How many grams make 1 kilogram? (a) 1000 (b) 10 (c) 100
4. _____________ is the force of gravity on an object. (a) Mass (b) Weight (c) Length