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KOTELCHEM:MODULE 1
Chemistry Module 1 Vocabulary
| Question | Answer |
|---|---|
| The study of matter and the changes that it undergoes | Chemistry |
| A measure that reflects the amount of matter | Mass |
| Matter that has a definite composition; also known as a chemical | Substance |
| The use of evidence to construct explanations and predictions of natural phenomena, as well as, the knowledge generated through this process | Science |
| A characteristic of a measured value describing the degree of exactness of a measurement; also refers to how close a series of measurements are to one another | Precision |
| A characteristic of a measured value that describes how well the results of a measurement agree with the “real” value, which is the accepted value, as measured by competent experiementers | Accuracy |
| A tentative, testable statement or prediction about what has been observed | Hypothesis |
| An explanation supported by many experiments; is still subject to new experimental data, can be modified, and is considered valid if it can be used to make predictions that are proven true | Theory |
| Describes a relationship in nature that is supported by many experiments | Scientific law |
| A type of scientific investigation that seeks to gain knowledge for the sake of knowledge itself | Pure research |
| A type of scientific investigation that is undertaken to solve a specific problems | Applied research |
| A measure of an amount of matter and also the effect of Earth’s gravitational pull on that matter | Weight |
| A visual, verbal, and/or mathematical explanation of data collected from many experiments | Model |
| A defined unit in a system of measurement that is based on an object or event in the physical world and is independent of other units | Base unit |
| A unit defined by a combination of base units | Derived unit |
| The metric unit for volume equal to one cubic decimeter | Liter |
| The amount of mass per unit volume; a physical property | Density |
| Expresses any number as a number between 1 and 10 (known as a coefficient) multiplied by 10 raised to a power (known as an exponent) | Scientific notation |
| A systematic approach to problem solving that uses conversion factor to move form one unit to another | Dimensional analysis |
| A ratio of equivalent values used to express the same quantity in different units; is always equal to 1 and changes the units of a quantity without changing its value | Conversion factor |
| The difference between an experimental value and an accepted value | Error |
| The ratio of an error to an accepted value | Percent error |
| The number of all known digits reported in measurements plus one estimated digit | Significant figures |
| A visual display of data | Graph |
| In an experiment, the variable that the experimenter plans to change | Independent variable |
| In an experiment, the variable whose value depends on the independent variable | Dependent variable |
Created by:
CRMissK
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