Question

1. observation and analysis (15 minutes)

have students record their observations about the effectiveness of each product.
discuss any unexpected outcomes or observations.
self - analysis questions

1. what specific properties of the cleaning products contributed to their effectiveness?
2. how did your understanding of the cleaning process evolve during the activity?
3. what skills did you utilize or develop during this lab activity?

Explanation:

For question 5, properties like chemical composition (e.g., presence of surfactants for grease - removal), pH (acidic or basic for different stains), and solubility contribute to cleaning product effectiveness. For question 6, understanding may evolve from initial assumptions about how a product works to more in - depth knowledge of its chemical reactions and mechanisms during use. For question 7, skills such as observation (recording product performance), data analysis (evaluating effectiveness), and critical thinking (answering self - analysis questions) may be utilized or developed.

Answer:

1. Chemical composition, pH, solubility etc. contribute to effectiveness.
2. From initial assumptions to knowledge of chemical reactions and mechanisms.
3. Observation, data analysis, critical thinking skills may be utilized or developed.