• Scientific Investigation Key Concepts

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    • Density expresses the relationship between mass and volume.
    •  Information and data collected can be organized and expressed in the form of charts, graphs, and diagrams.
    • Changing relevant variables will generally change the outcome.
    • A hypothesis can be supported, modified, or rejected based on collected data. A hypothesis is a tentative explanation that accounts for a set of facts and can be tested by further investigation.
    • Experiments are designed to test hypotheses.
    • Scientific laws are generalizations of observational data that describe patterns and relationships. Laws may change as new data become available.
    • Scientific theories are systematic sets of concepts that offer explanations for observed patterns in nature. Theories provide frameworks for relating data and guiding future research. Theories may change as new data become available.