Objects that sink in water

Subject : 

Basic Science and Technology

Term :

Second Term


Week 8

Class :

Basic 2 / Primary 2/ grade 2


Previous lesson : 

The pupils have previous knowledge of    Objects that float in water    that was previously taught in their previous lesson on Basic Science and Technology

Topic :

Objects that sink in water


Behavioural objectives :

At the end of the lesson, the pupils should be able to

  • say the meaning of sinking
  • say the examples of objects that sink in water
  • say why these objects are able to sink in  water


Instructional Materials :

  • Wall charts
  • Pictures
  • Related Online Video
  • Flash Cards
  • Bottles
  • Pins
  • Nails

Methods of Teaching :

  • Class Discussion
  • Group Discussion
  • Asking Questions
  • Explanation
  • Role Modelling
  • Role Delegation


Reference Materials :

  • Scheme of Work
  • Online Information
  • Textbooks
  • Workbooks
  • 9 Year Basic Education Curriculum
  • Workbooks


Content :

What are the Objects that sink in Water 

Objects that sin in water are the objects that when they are thrown into water , they do  not float  on the water . These objects submerge or sink deep into water .Objects that sink in water are the objects that will not float when they are in water .


What makes most objects to sink in Water ?

What makes most objects to sink in water is the weight  of that particular object . If the water of that particular objects is much more that that of the surrounding water , then that object will sink in water .


What are the examples of objects that  sink in water ?

Objects that sink in water are always heavy and not light . Some are round, heavy . metal, iron  and yet they sink water . Examples of objects that sink in water are

  • iron nails
  • pressing iron
  • magnet
  • spoon
  • axe
  • cutlass
  • stones
  • mobile phones
  • coin
  • torch light



The topic is presented step by step


Step 1:

The class teacher revises the previous topics


Step 2.

He introduces the new topic


Step 3:

The class teacher allows the pupils to give their own examples and he corrects them when the needs arise




The class teacher wraps up or conclude the lesson by giving out short note to summarize the topic that he or she has just taught.

The class teacher also goes round to make sure that the notes are well copied or well written by the pupils.

He or she does the necessary corrections when and where  the needs arise.



  • What are sinking objects
  • What makes objects to sink in water
  • mention two examples of objects that sink in water




Prepare for the next lesson by reading about Colour


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