New 9th Grade Vocab Terms
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35 terms
Terms | Definitions |
|---|---|
 Chemistry | The study of the composition, structure, properties, and reactions of matter. |
| Physics | The study of matter and energy and the interactions between the two thru forces and motion. |
| Geology | The study of the origin, history and structure of Earth. |
| Astronomy | The study of the universe beyond Earth. |
| Biology | The study of life and life processes. |
| Scientific Method | An organized plan used for gathering, organizing and communicating info. |
| Hypothesis | A proposed answer to a question |
| Manipulated Variable | The variable that causes a change in another variable. |
| Responding Variable | A variable that changes in response to a change in the manipulated variable. |
| Scientific Theory | A well-test explanation for a set of observations or experimental results. |
| Scientific Law | A statement that summarizes a pattern found in nature. |
| Model | A representation of an object or event. |
| Scientific Notation | A way of expressing a value as the product of a number between 1 and 10 and a power of 10. |
| Length | The straight-line distance between two points. |
| Mass | The amount of matter in an object. |
| Volume | The amount of space an object takes up. |
| Density | The ratio of a material's mass to its volume. |
| Conversion Factor | A ratio of equivalent measurements that is used to convert a quantity from one unit to another |
| Precision | A gauge of how exact a measurement is. |
| Significant Figures | All the digits in a measurement that are directly measured, plus the last digit which is estimated |
| Accuracy | The closeness of measurement to the true value of what is measured. |
| Slope | The steepness of a line, equal to the ratio of a vertical change to the corresponding horizontal change. |
| Direct Proportion | A relationship between two variables in which their ratio is constant. |
| Inverse Proportion | A relationship in which the product of two variables is a constant when all other variable are held constant. |
| Pure Substance | Matter that always has exactly the same composition; an element or compound. |
| Element | A substance that cannot be broken down into simpler substances. |
| Atom | The smallest particle of an element. |
| Compound | A substance that is made from two or more simpler substances and can be broken down into those simpler substances. |
| Heterogeneous Mixture | A type of mixture in which the parts of the mixture are noticeably different from one another. |
| Homogeneous Mixture | A type of mixture in which the substances are so evenly distributed that it is difficult to distinguish one substance in the mixture from another. |
| Solution | A mixture that forms when substances dissolve and form a homogeneous mixture. |
| Suspension | A heterogeneous mixture that separates into layers over time. |
| Colloid | A mixture that contains some particles that are intermediate in size between the small particles in a solution and the larger particles in suspension. |
| Physical Property | Any characteristic of a material that can be observed or measured without changing the composition of the substances in the material. |
| Viscosity | The tendency of a liquid to keep from flowing; resistance to flowing. |
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