NGSS Nature of Science Thread:
Science Knowledge is Based on Empirical Evidence

Science arguments are strengthened by multiple lines of evidence supporting a single explanation.

Related Science and Engineering Practices

Practice 4: Analyzing and Interpreting Data

  • Analyze data using tools, technologies, and/or models (e.g., computational, mathematical) in order to make valid and reliable scientific claims or determine an optimal design solution.

  • Apply concepts of statistics and probability (including determining function fits to data, slope, intercept, and correlation coefficient for linear fits) to scientific and engineering questions and problems, using digital tools when feasible.

  • Consider limitations of data analysis (e.g., measurement error, sample selection) when analyzing and interpreting data.

  • Compare and contrast various types of data sets (e.g., self-generated, archival) to examine consistency of measurements and observations.

  • Evaluate the impact of new data on a working explanation and/or model of a proposed process or system.

  • Analyze data to identify design features or characteristics of the components of a proposed process or system to optimize it relative to criteria for success.

Practice 6: Constructing Explanations and Designing Solutions

  • Make a quantitative and/or qualitative claim regarding the relationship between dependent and independent variables.

  • Construct and revise an explanation based on valid and reliable evidence obtained from a variety of sources (including students’ own investigations, models, theories, simulations, peer review) and the assumption that theories and laws that describe the natural world operate today as they did in the past and will continue to do so in the future.

  • Apply scientific ideas, principles, and/or evidence to provide an explanation of phenomena and solve design problems, taking into account possible unanticipated effects.

  • Apply scientific reasoning, theory, and/or models to link evidence to the claims to assess the extent to which the reasoning and data support the explanation or conclusion.

  • Design, evaluate, and/or refine a solution to a complex real-world problem, based on scientific knowledge, student-generated sources of evidence, prioritized.

Practice 7: Engaging in Argument from Evidence

  • Compare and evaluate competing arguments or design solutions in light of currently accepted explanations, new evidence, limitations (e.g., trade-offs), constraints, and ethical issues.

  • Evaluate the claims, evidence, and/or reasoning behind currently accepted explanations or solutions to determine the merits of arguments.

  • Respectfully provide and/or receive critiques on scientific arguments by probing reasoning and evidence, challenging ideas and conclusions, responding thoughtfully to diverse perspectives, and determining additional information required to resolve contradictions.

  • Construct, use, and/or present an oral and written argument or counter-arguments based on data and evidence.

  • Make and defend a claim based on evidence about the natural world or the effectiveness of a design solution that reflects scientific knowledge and student generated evidence.

  • Evaluate competing design solutions to a real-world problem based on scientific ideas and principles, empirical evidence, and/or logical arguments regarding relevant factors (e.g. economic, societal, environmental, ethical considerations).

Practice 8: Obtaining, Evaluating, and Communicating Information

  • Critically read scientific literature adapted for classroom use to determine the central ideas or conclusions and/or to obtain scientific and/or technical information to summarize complex evidence, concepts, processes, or information presented in a text by paraphrasing them in simpler but still accurate terms.

  • Compare, integrate and evaluate sources of information presented in different media or formats (e.g., visually, quantitatively) as well as in words in order to address a scientific question or solve a problem.

  • Gather, read, and evaluate scientific and/or technical information from multiple authoritative sources, assessing the evidence and usefulness of each source.

  • Evaluate the validity and reliability of and/or synthesize multiple claims, methods, and/or designs that appear in scientific and technical texts or media reports, verifying the data when possible.

  • Communicate scientific and/or technical information or ideas (e.g. about phenomena and/or the process of development and the design and performance of a proposed process or system) in multiple formats (i.e., orally, graphically, textually, mathematically).

Related Crosscutting Concepts

None for this standard.

Performance Expectations and Disciplinary Core Ideas by Subject

Biology

Performance Standards

  • HS-LS1 – FROM MOLECULES TO ORGANISMS: STRUCTURES AND PROCESSES

    • HS-LS1-3: Plan and conduct an investigation to provide evidence that feedback mechanisms maintain homeostasis.

  • HS-LS4 – BIOLOGICAL EVOLUTION: UNITY AND DIVERSITY

    • HS-LS4-1: Communicate scientific information that common ancestry and biological evolution are supported by multiple lines of empirical evidence.

    • HS-LS4-2: Construct an explanation based on evidence that the process of evolution primarily results from four factors: (1) the potential for a species to increase in number, (2) the heritable genetic variation of individuals in a species due to mutation and sexual reproduction, (3) competition for limited resources, and (4) the proliferation of those organisms that are better able to survive and reproduce in the environment.

    • HS-LS4-4: Construct an explanation based on evidence for how natural selection leads to adaptation of populations.

Disciplinary Core Ideas

  • LS4: BIOLOGICAL EVOLUTION: UNITY AND DIVERSITY

    • LS4.A: Evidence of Common Ancestry and Diversity

      • Genetic information provides evidence of evolution. DNA sequences vary among species, but there are many overlaps; in fact, the ongoing branching that produces multiple lines of descent can be inferred by comparing the DNA sequences of different organisms. Such information is also derivable from the similarities and differences in amino acid sequences and from anatomical and embryological evidence.

Chemistry

Performance Standards

  • HS-PS1 – MATTER AND ITS INTERACTIONS

    • HS-PS1-2: Construct and revise an explanation for the outcome of a simple chemical reaction based on the outermost electron states of atoms, trends in the periodic table, and knowledge of the patterns of chemical properties.

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

    • HS-PS4-4: Evaluate the validity and reliability of claims in published materials of the effects that different frequencies of electromagnetic radiation have when absorbed by matter.

Disciplinary Core Ideas

  • PS1: MATTER AND ITS INTERACTIONS

    • PS1.A: Structure and Properties of Matter

      • Each atom has a charged substructure consisting of a nucleus, which is made of protons and neutrons, surrounded by electrons. (HS-PS1-1)

      • The periodic table orders elements horizontally by the number of protons in the atom’s nucleus and places those with similar chemical properties in columns. The repeating patterns of this table reflect patterns of outer electron states. (HS-PS1-1), (HS-PS1-2) (Note: This Disciplinary Core Idea is also addressed by HS-PS1-1.)

      • The structure and interactions of matter at the bulk scale are determined by electrical forces within and between atoms. (HS-PS1-3)

      • Stable forms of matter are those in which the electric and magnetic field energy is minimized. A stable molecule as less energy than the same set of atoms separated; one must provide at least this energy in order to take the molecule apart.

  • PS4: WAVES AND THEIR APPLICATIONS IN TECHNOLOGIES FOR INFORMATION TRANSFER

    • PS4.B: Electromagnetic Radiation

      • Electromagnetic radiation (e.g., radio, microwaves, light) can be modeled as a wave of changing electric and magnetic fields or as particles called photons. The wave model is useful for explaining many features of electromagnetic radiation, and the particle model explains other features.

      • When light or longer wavelength electromagnetic radiation is absorbed in matter, it is generally converted into thermal energy (heat). Shorter wavelength electromagnetic radiation (ultraviolet, X-rays, gamma rays) can ionize atoms and cause damage to living cells.

      • Photoelectric materials emit electrons when they absorb light of a high-enough frequency.

      • Atoms of each element emit and absorb characteristic frequencies of light. These characteristics allow identification of the presence of an element, even in microscopic quantities.

Physics

Performance Standards

  • None for Physics

Disciplinary Core Ideas

  • None for Physics

Nature of Science Standards within the same thread