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Phys Sci-Ch 1
vocab words
| Question | Answer |
|---|---|
| science | system of knowledge and methods used to find that knowledge |
| technology | use of knowledge to solve practical problems |
| chemistry | study of the composition, structure, properties, and reactions of matter |
| physics | study of matter and energy and the interactions between the two through forces and motions |
| geology | the study of the origin, history and structure of Earth |
| astronomy | study of the universe beyond Earth, including the sun, moon and stars |
| biology | study of living things |
| scientific method | organized plan for gathering, organizing and communicating information |
| observation | information you obtain through your senses |
| hypothesis | proposed answer to a question - must be testable |
| manipulated variable | variable that causes a change in another |
| responding variable | variable that changes in response to the manipulated variable |
| controlled experiment | experiment where the manipulated variable is deliberately changed at a time. The responding variable is observed for changes - all other variables are kept constant |
| scientific theory | well-tested explanation for a set of observations or experimental results |
| scientific law | statement that summarizes a pattern found in nature - doesn't try to explain it |
| model | representation of an object or event - makes it easier to understnd things that are too hard to observe directly |
| scientific notation | way of expressing a value asthe product of a number between 1 and 10 and a power of ten - makes it easier to work with very large or very small numbers |
| length | straight line distance between two points; SI unit =meter |
| mass | quantity of matter in an object; SI unit = kilogram or grams |
| volume | amount of space taken up by an object; number will be cubed; SI unit liters |
| density | ratio of an object's mass to it's volume; D=M/V |
| conversion factor | ratio of equivalent measurements that are used to convert a quantity expressed in one unit to another: example changing meters to kilometers |
| precision | 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 | closeness of a measurement to the actual value of what is being measured |
| thermometer | instrument that measures temperature, or how hot or cold an object is |
| slope | of a line; ratio of vertical change to the corresponding horizontal change or rise/run |
| direct proportion | relationship in which the ratio of two variable is constant - Density and mass |
| inverse proportion | relationship in which the product of two variables is constant - volume and density |
| System International | A set of universal measurements that scientists all over the world use. (S.I.) |
| centi | (c) hundredth |
| deci | (d) tenth |
| mili | (m) thousandth |
| kilo | (k) thousand |
| deka | (da) ten |
| base unit | The seven metric units that the SI system is built on; mass is grams, meters is length, liters is volume, time is seconds and temp is Kelvins...... |
| hecto | (h) hundred |
Created by:
msparks
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