Payfong Middle School
In this activity, groups of students made water filters with wood shreds, sticks, cotton... They went out around the campus for more reliable results. In the end, each group successfully made dirty and muddy water clearer.
In this activity, groups of students made water filters with wood shreds, sticks, cotton... They went out around the campus for more reliable results. In the end, each group successfully made dirty and muddy water clearer.