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TE Chem Unit 1

TE Chem Unit 1 Vocabulary

Chemistry The study of the composition, structure, and properties of matter and the changes it undergoes
Change of State A physical change of a substance from one phase to another (example: gas to liquid)
Chemical Change A change in which one or more substances are converted into different substances
Chemical Property The ability of a substance to undergo a change that transforms it into a different substance
Compound A substance that is made from the atoms of two or more elements that are chemically bonded
Element A pure substance made of only one kind of atom
Gas The state of matter in which a substance has neither definite volume nor definite shape
Liquid The state of matter in which the substance has a definite volume but an indefinite shape
Mass A measure of the amount of matter
Matter Anything that has mass and takes up space
Mixture A blend of two or more kinds of matter, each of which retains its own identity and properties
Physical Change A change in a substance that does not involve a change in the identity of the substance
Physical Property A characteristic that can be observed or measured without changing the identity of the substance
Pure Substance A substance that has a fixed composition and differs from a mixture in that every sample of a given pure substance has exactly the same characteristic properties and composition
Solid The state of matter in which the substance has definite volume and definite shape
Solution the best mixed mixture
Density a measurement that reflects how closely packed the particles in a substance are
Hypothesis An if, then statement that can be tested
Independent Variable the variable that you change
Dependent Variable the variable that responds and you measure it
Controlled Variable part of an experiment that you do not change
Heterogeneous Mixture A blend of two or more substances that are not evenly mixed
Homogeneous Mixture A blend of two or more substances that are evenly mixed
Volume a measure of the amount of space occupied by an object
Precision how well repeated measurements agree with each other
Accuracy how close a measurement is to the accepted value
Qualitative measurement a description that does not use numbers
Quantitative measurement a description that uses numbers
Created by: kost