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Chemistry Test 1

Accuracy refers to the closeness of measurements to the correct or accepted value
Precision refers to the closeness of a set of measurements of the same quantity made in the same way
What is not a chemical? light, sound, energy
Organic Study of most carbon (C) containing compounds
Inorganic Study of compounds that are not organic
Physical Study of the properties and changes of matter and their relation to energy
Analytical The identification of the compounds and composition of materials
Biochemistry Study of the substances and processes occurring in living things
Theoretical The use of math and computes to understand the principles behind observed chemical behavior and to design and predict the properties of new compounds
inference conclusion based on facts rather then direct observation
What is a theory? A broad generalization that explains a body of facts of phenomena
What is chemistry? the study of matter and its ability to change
What is a chemical? is any substance that has a definite composition
Matter anything that has mass and takes up space
Mass a measure of the amount of matter
Volume the amount if three dimensional space an object occupies
Atom the smallest unit of an element that maintains the properties of that element
Element a pure substance made of only one kind of atom
Compound a substance that is made from the atoms of two or more elements that are chemically bonded
Physical property a characteristic that can be observed or measured with out changing the identity of the substance
Physical Change a change in a substance that does not involve a change in the identity of the substance
change of state is a physical change of a substance from one state to another
What are three common states of matter? solid, liquid, and gas
chemical property relates to a substance’s ability to undergo changes that transform it into different substances
reactants • The substances that reacts in a chemical change
products • The substances that are formed by the chemical
mixture a blend of two or more kinds of matter, each of which retains its own identity and properties
Homogenous mixtures are uniform in composition. They have the same proportion of components throughout
Heterogeneous mixtures are not uniform throughout
Independent variable the one factor that you change during an experiment
Dependant variable the factor that you observe
Created by: mmichell08