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Chemistry Chapter 1

TermDefinition
Chemistry the study of matter and the changes that it undergoes
Substance it is matter that has a definite and uniform composition
Ozone a substance that forms a protective layer in Earth's atmosphere
Mattere anything that has mass and takes up space
Technology practical application of scientific information
Observation act of gathering information
Chemical ?
CFC synthetic substances made of chlorine, florine, and carbon that are thinning the ozone layer
Mass a measurement that reflects the amount of matter
Model visual, verbal, or mathmetical explanation of experimental data
Weight a measure not only of the amount of matter but also the effect of Earth's gravitational pull on that matter
Conclusion a judgment based on the information obtained
Control a standard for comparison
Experiment a set of controlled observations that test the hypothesis
Scientific law a relatitonship in nature that is supported by many experiments
Scientific method systematic approach used in scientific study
Applied research undertaken to solve a specific problem
Pure research gains knowledge for the sake of knowledge
Dependent variable **change in response to the independent variable
Independent variable **changed in an experiment
Qualitative data **describes an observation..describes color, odor, or other physical characteristics
Quantitative data uses numbers to measure
Theory an explanation of a natural phenomenon based on observations and investigations over time
Hyphothesis a tentative explanation for what has been observed--a set of controlled observations (educated guess)
Created by: annetteogden
 

 



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