Fundamental chemistry concepts on environmental pollution: Experts validation of pre-learning questions

The purpose of the research was conducting expert validation on environmental pollution problems based on the fundamental chemistry concepts. The type of research was design and development that involved three experts as validators. Data processing was carried out using SPSS ver.26 through the Kendall test. The values of Asymp.Sig. showed that pre-learning questions were valid in terms of the compatibility of pre-learning questions with indicators of the national curriculum and SDGs, compatibility of pre-learning questions with creative thinking indicators, and clarity of language use. The pre-learning questions were divided into ten indicators. Most of them asked students to describe of how greenhouse gases, heavy metal, and solid or liquid nano-plastic destroy environment. Students explained and wrote the chemical representations of those processes, namely macroscopic, sub-microscopic, and symbolic. Pre-learning questions were valid because they have conducted a curriculum review and the needs analysis. Besides, the creation process also involved teachers who mastered fundamental concept of chemistry and understood the condition of students. The validated pre-learning question is expected to help teachers deliver the fundamental concepts of chemistry on environmental pollution well so that teachers can achieve learning objectives.