The document discusses science process skills which are logical thinking operations used in investigations. Basic process skills include observing, comparing, classifying, quantifying, inferring, predicting, communicating, and manipulative skills. Integrated process skills involve hypothesizing, controlling variables, and classifying data as part of experimenting. Each basic skill is then defined, with qualitative and quantitative observation, classification by similarities and differences, comparison to find relationships, inference from observations, prediction using past data, quantification through measurement, communication of ideas, and use of materials and equipment as manipulative skills. Inquiry involves asking questions, designing procedures, gathering empirical data, and drawing conclusions from evidence.