Substances may also be classified into acids and bases. In the laboratory, we identified which common household substances are acidic or basic by using blue and red litmus paper. We tested the following substances: toothpaste vinegar calamansi detergent powder chlorine soda The substances were dissolved…
Month: July 2014
Grade 7 Science: Elements, Compounds and Mixtures
As a culminating lesson, I held an interactive lecturette with my students, where we summarized what we have learned the first two chapters of the Learner’s Material for Grade 7 Science. We first recalled the big ideas behind the previous laboratory activities from properties of…
