Week: Eight

Class: Primary Three

Topic: Making water fit for drinking (Filtration)

Objectives: At the end of the lesson, pupils should be

able to:

1. Explain and name some chemicals for filtering.

2. describe ways of filtering.

3. Explain the changes that occur when alum is put in water.

Reference material: Sieve cloth, Coloured water e.g. muddy water, Basin, Disinfectants e.g. TCP, Dettol, Alum, Charts.

Content:

Filtration: The act or process of filtering; the mechanical separation of a liquid from the undissolved particles floating in it. Filtration is the process of separating suspended solid matter from a liquid, by causing the latter to pass through the pores of some substance, called a filter. The liquid which has passed through the filter is called the filtrate.

Process.... View More