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chemistry q.1(pg2-7)
| Term | Definition |
|---|---|
| chemistry | the branch of science that deals with the study of the composition, structure, and properties of matter and the changes that matter undergoes |
| physical, organic, inorganic, biochemistry, analytical | the five major branches of chemistry |
| physical | the type of chemistry that deals with applying the theories of physics to the study of reactions and properties of matter |
| organic | type of chemistry that studies substances that are compounds of carbon |
| inorganic | type of chemistry that studies substances that are compounds of elements other than carbon |
| biochemistry | the chemistry of living things |
| analytical | deals with identifying what substances are present in materials and how much of each substance is present |
| clinical chemistry | combines biochemistry and analytical chemistry |
| polymer chemistry | includes organic, physical, and analytical chemistry |
| pharmaceutical chemistry | involves biochemistry, organic, and analytical chemistry |
| all - pervasive | chemistry in our daily lives is |
| chemist | the most obvious career directly related to chemistry |
| chemical engineers | apply their understanding of chemistry to solve everyday problems |
| lab technician | carry out routine analysis, operate instruments, prepare samples, or help write lab reports |
| scientific journalist | combine writing with chemistry |
| illustrator | an artistic person may become this for textbook Publishers or scientific publication |
| nutritionist | must understand the basic processes that occur in a complex chemical Factory--the human body |
| forensic chemist | apply chemistry to legal questions |
| criminology | scientific crime detection |
| science | the systematic study of God's universe and how it works |
| scientific method | system to guide man's study of creation |
| observing, hypothesizing, experimenting | the three main steps of the scientific method |
| observing | measurement, organizing data, and searching scientific literature to learn about the work of other scientists |
| hypothesizing | suggesting explanations for observations |
| hypothesis | a tentative explanation of a natural phenomenon |
| testable, reproducible | two requirements for a good hypothesis |
| experimenting | setting up carefully controlled artificial situations to test a hypothesis |
| experiments | carefully controlled artificial situations |
| variable | one factor changed in an experiment |
| constants | unchanged factors in an experiment |
| theory | a hypothesis that has been supported by many experiments and verified by other scientists |
| scientific law | a theory that has stood the test of time |
| physical universe | science only deals with what |
| answer all our questions | even in the physical Universe, science cannot |
| an orderliness that leads to reproducible effects | the science of chemistry is not governed by haphazard or disordered principles but rather by |
| Sir William Thompson, Lord Kelvin | said that a study is only science when it can be measured |
| precision | the consistency or reproducibility of a measurement; closely related to uncertainty |
| accuracy | how close the measurement is to the actual, exact value |
| random errors | errors in precision |
| systematic errors | errors in accuracy with definite causes |
| values obtained by counting and defined values | types of exact numbers |
| measurement | there is always some uncertainty in a |
| system of measurement | a collection of compatible, related units that can be used to measure various quantities |
| F. P. S. System | system of measurement most commonly used in the United States |
| metric system | worldwide standard system of measurement |
| SI | a modification of the metric system with meticulously defined standards for all units |
| prefixes | are added to the base units name to change its value; what SI uses to form larger or smaller units |
| meter | standard SI unit of length |
| exact numbers | numbers with no uncertainty |