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Ch. 1 Science Skills


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.
manipulated variable (independent variable) the variable that causes a change in another variable
responding variable (dependent 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 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 between 1 and 10 and a power of 10.
length the straight line distance between two points.
mass the amount of matter in an object.
volume the amount of space taken up by an object.
density the ratio of a material's mass to its volume
conversion factor a ratio of equivalent measurements that is used to convert a quantity from one unit to another.
precision a gauge of how exact a measurement is.
significant figures all the digits in a measurement 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 the ratio of a vertical change to the corresponding horizontal change.
direct proportion a relationship between two variables in which their ratio is constant.
inverse proportion a relationship in which the product of two variables is a constant when all other variables are held constant.
Created by: frankivagnozzi16