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MSniderStack Ch1 CIA
Science Skills ch 1 Physical Science Conceptions in Action
Vocabulary word | definition |
---|---|
science | a system of knowledge about the natural world and the methods used to find that knowledge |
technology | the use of scientific 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 |
biology | the study of life and life processes |
scientific method | an organized plan used for gathering, organizing, and communicating information |
observation | information obtained through the senses |
hypothesis | a proposed answer to a question |
observation | information that is gained through your senses |
hypothesis | a proposed answer to a question |
manipulated variable | a variable that is changed during an experiment;a variable that causes another to change |
responding variable | the variable that changes in response to a manipulated variable |
controlled experiment | an experiment in which only ome 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 an event |
scientific notation | a shortcut for representing very large or very small numbers |
length | the straight linedistance between two points |
mass | a 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 | ratio of equivalent measurements that is used to convert a quantity expressed in one unit to another unit |
precision | the guage of how exact a measurement is |
significant figures | are all the digits that are known in a measurement, plus the last digit that is estimated |
accuracy | the closenessof a measurement to the actual value of what is being measured |
thermometer | an instrument that measures temperature, or how hot an object is |
slope | the steepness of a line that is the ratio of a vertical change to the corresponding horizontal change |
direct proportion | a relationship in which the ratio of two variables is constant |
inverse proportion | a relationship in which the product of two variables is a constant |