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### 25 Cards in this Set

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 What is...Science? A process of understanding the world where information is gained. Technology The application of information to make living easy. Chemistry The study of the composition, structure, properties, & reactions of matter. Physics The study of matter & energy, & the interactions between the two through forces & motion. Geology The study of the origin, history, & structure of earth. Astronomy The study of the universe beyond earth. Biology The study of life & it's processes. Scientific Method An organized plan used for gathering, organizing, & communicating information. Observation The information obtained through the senses. 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. Controlled Experiment An experiment in which only one variable, the manipulated variable, is deliberately changed at one time. Scientific Theory A well-tested explantation for a set of observations or experimental results. Scientific Law A statement that summeriees 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 1-10 & a power of 10. Conversion Factor A ratio of equal measurements that is used to convent a quanity from one unit to another. Precision A gauge of how exact a measurement is. Significant Figures All the digits in a measurements that are directly measured, plus the last digit, which is estimated. Accuracy The closeness of a measurement to the true value of what is measured. Thermometer An instrument that measures temperature. Slope The steepness of a line, equal to a ratio of a vertical change to the corresponding horizontal change. Direct Proportion A realtionship between two variables in which their ratio is constant. Inverse Proportion A relationship in which the product of two variables is a constant whenall other variables are held constant.