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MSniderStack Ch1 CIA

Science Skills ch 1 Physical Science Conceptions in Action

Vocabulary worddefinition
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
Created by: marjan123
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