NGSS Nature of Science Thread:
S
cience Models, Laws, Mechanisms, and Theories Explain Natural Phenomena

Scientists often use hypotheses to develop and test theories and explanations.

Related Science and Engineering Practices

Practice 1: Asking Questions and Defining Problems

  • Ask questions that arise from careful observation of phenomena, or unexpected results, to clarify and/or seek additional information.

  • Ask questions that arise from examining models or a theory, to clarify and/or seek additional information and relationships.

  • Ask questions to determine relationships, including quantitative relationships, between independent and dependent variables.

  • Ask questions to clarify and refine a model, an explanation, or an engineering problem.

  • Evaluate a question to determine if it is testable and relevant.

  • Ask questions that can be investigated within the scope of the school laboratory, research facilities, or field (e.g., outdoor environment) with available resources and, when appropriate, frame a hypothesis based on a model or theory.

  • Ask and/or evaluate questions that challenge the premise(s) of an argument, the interpretation of a data set, or the suitability of a design.

  • Define a design problem that involves the development of a process or system with interacting components and criteria and constraints that may include social, technical, and/or environmental considerations.

Related Crosscutting Concepts

None for this standard.

Performance Expectations and Disciplinary Core Ideas by Subject

Biology

Performance Standards

  • None for Biology

Disciplinary Core Ideas

  • None for Biology

Chemistry

Performance Standards

  • HS-PS4 – WAVES AND THEIR APPLICATIONS IN TECHNOLOGIES FOR INFORMATION TRANSFER

    • HS-PS4-3: Evaluate the claims, evidence, and reasoning behind the idea that electromagnetic radiation can be described either by a wave model or a particle model, and that for some situations one model is more useful than the other.

Disciplinary Core Ideas

  • PS1: MATTER AND ITS INTERACTIONS

    • PS1.B: Chemical Reactions

      • Chemical processes, their rates, and whether or not energy is stored or released can be understood in terms of the collisions of molecules and the rearrangements of atoms into new molecules, with consequent changes in the sum of all bond energies in the set of molecules that are matched by changes in kinetic energy. (HS-PS1-4), (HS-PS1-5)

      • In many situations, a dynamic and condition-dependent balance between a reaction and the reverse reaction determines the numbers of all types of molecules present. (HS-PS1-6)

      • The fact that atoms are conserved, together with knowledge of the chemical properties of the elements involved, can be used to describe and predict chemical reactions. (HS-PS1-2), (HS-PS1-7)

Physics

Performance Standards

  • None for Physics

Disciplinary Core Ideas

  • None for Physics