Ask and refine questions that lead to descriptions and explanations of how the natural and designed world works and which can be empirically tested.
Use and construct models as helpful tools for representing ideas and explanations. These tools include diagrams, drawings, physical replicas, mathematical representations, analogies, and computer simulations.
Plan and carry out investigations in the field or laboratory, working collaboratively as well as individually. Investigations are systematic and require clarifying what counts as data and identifying variables or parameters.
Use a range of tools—including tabulation, graphical interpretation, visualization, and statistical analysis—to identify the significant features and patterns in the data. Identify sources of error in the investigations and calculate the degree of certainty in the results.
Mathematics and computation are fundamental tools for representing physical variables and their relationships. They are used for a range of tasks such as constructing simulations; statistically analyzing data; and recognizing, expressing, and applying quantitative relationships.
The products of science are explanations and the products of engineering are solutions.
Argumentation is the process by which explanations and solutions are reached.
Scientists and engineers must be able to communicate clearly and persuasively the ideas and methods they generate. Critiquing and communicating ideas individually and in groups is a critical professional activity.