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IGHS Winkels
Physical Science Chapter 1
| Term | Definition |
|---|---|
| science | a system of knowledge and the methods you use to find that knowledge |
| technology | the use of knowledge to solve practical problems |
| 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 through forces and motion |
| geology | the study of the origin, history, and structure of Earth |
| astronomy | the study of the universe beyond Earth, including the sun, moon, planets, and stars |
| biology | the study of living things |
| scientific method | an organized plan for gathering, organizing, and communicating information |
| observation | information that you obtain through your senses |
| hypothesis | a proposed answer to a question |
| manipulated variable | the variable that causes a change in another |
| responding variable | the variable that changes in response to the manipulated variable |
| controlled experiment | an experiment in which only one variable, the manipulated variable, is deliberately changed at a time |
| scientific theory | a well-tested 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 between1 and 10 and a power of 10 |
| length | the straight-line distance between two points |
| mass | the quantity of matter in an object or sample |
| volume | the amount of space taken up by an object |
| density | the ratio of an object's mass to its volume |
| conversion factor | a ratio of equivalent measurements that is used to convert a quantity expressed in one unit to another unit |
| precision | a gauge of how exact a measurement is |
| significant figures | all the digits that are known in a measurement plus the last digit that is estimated |
| accuracy | the closeness of a measurement to the actual value of what is being measured |
| thermometer | is an instrument that measures temperature, or how hot an object is |
| slope | of this line is the ratio of a vertical change to the corresponding horizontal change |
| direct proportion | a relationship in which the ratio of two variables is contant |
| inverse proportion | a relationship in which the product of two variables is a constant |
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Winkels
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