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NOS Chapter

biodegradable capable of being broken down
organic made of carbon; derived from living things
controlled experiment contains two groups: controlled and experimental used to show how a changed in the independent causes a change in the dependent variable
observation using one or more of your senses to gather information; take note of what occurs
inference a logical explanation of an observation that is drawn from prior knowledge or experience
prediction a statement of what wil happen next in a sequence of events or in an experiment
scientific theory an explanation of observations or events based on knowledge gained from many observations and investigations
independent variable in a controlled experiment, it it remains the same; it changes the dependent variable the factor that you want to test; it can be changed by the investigator to observe how it affects a dependent variable
dependent variable the factor measured or observed during an experiment
variable any factor in an experiment that can have more than one value
constant the factor(s) in an experiment that remain the same
hypothesis a possible explanantion about an observation that can be tested by scientific investigation(s)
description a spoken or written summary of observations
explanation an interpretation of observations
precision a decription of how similiar or close measurements are to each other
accuracy a description of how close a measurement is to an accepted or true value
bias intentional or unintentional prejudice towards an outcome
ethics an acceptable standard of conduct; rules of conduct or moral principle
blind study a procedure that reduces bias; investigato, subject, or both do not know which item they are testing
sampling a method of data collection that involves studying small amounts of something in order to learn about the larger whole