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ChemistryChapter 1&2

Chemistry Chapter 1

Chemistry The study of matter and the changes it undergoes.
Matter Anything that has mass and takes up space.
Mass A measurement of the amount of matter in an object.
Weight The effect of Earth's gravitational pull on an object.
Scientific Method The systematic approach to answering a question or studying a situation.
Qualitative Data Information described with the sense; examples include smell, color, texture, or shape.
Quantitative Data Numerical information; examples include mass, size, or speed.
Hypothesis A possible explanation for an observation.
Experiment A set of controlled observations meant to test a hypothesis.
Independent Variable The variable that is knowingly changed in an experiment.
Dependent Variable The variable that changes depending on the independent variable. The variable you are measuring.
Control Variable The constant variable used for comparison.
Conclusion A judgement based on data obtained in an experiment.
Model An explanation for a studied phenomenon.
Theory An explanation supported by many experiments.
Scientific Law Describes a relationship in nature that is supported by many experiments for which no exception has been found.
Base Unit A unit of measurement based on an object or event in the physical world.
Created by: Saya-Bella



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