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ChemistryChapter 1&2
Chemistry Chapter 1
Term | Definition |
---|---|
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. |