A physical change of matter from one phase to another.
What is a phase change?
100
A combination of two or more pure substances in which each pure substance retains its individual chemical properties.
What is a mixture?
100
A pure substance that cannot be separated into simpler substances by physical or chemical means.
What is an element?
100
A process that includes: Observations, Hypothesis, Experiment, Conclusions, Revised Hypothesis, Experiments, Conclusions, Theory, Experiments, Revised Theory, Theory, Scientific Law...etc...
What is the scientific method?
200
Two categories of pure and unchanging substances.
What are elements and compounds?
200
A law that states that mass is neither created nor destroyed during a chemical reaction; it is conserved.
What is The Law of Conservation of Mass?
200
A mixture that has a constant composition throughout; it always has a single phase.
What is a homogeneous mixture?
200
Two organizational features of the Periodic Table.
What are Families/Columns and Periods/Rows?
200
A standard variable that is kept constant in an experiment.
What is a control?
300
Four states of matter.
What are solid, liquid, gas, and plasma?
300
It involves a change in the composition of a substance, and it may be described by the terms: tarnish, ferment, burn, rot, decompose, explode, rust, oxidize, and corrode.
What is a chemical change?
300
A mixture that does not blend smoothly throughout and in which the individual substances remain distinct.
What is a heterogeneous mixture?
300
They have similar physical properties, and similar chemical properties; and they form columns in the Periodic Table.
What are Families/ Groups?
300
The variable, in an experiment, that you plan to change.
What is the independent variable?
400
Characteristics of matter that can be observed and measured without changing the composition of matter. Includes phase changes, state of matter, color, melting point, boiling point, and density (g/cm3).
What are physical properties?
400
It alters the physical properties of a substance without changing its composition.
What is a physical change?
400
A word that means the same thing as "Homogeneous Mixture." The word begins with an "S" and ends with "n."
What is a "Solution?"
400
Two or more different Elements that are combined CHEMICALLY.
What is a compound?
400
The variable, in an experiment, that depends on the independent variable.
What is the dependent variable?
500
The ability or inability of a substance to combine with or to change into one or more other substances.
What are chemical properties?
500
Vaporizing, boiling, melting, and solidification.
What are examples/terms that refer to physical changes?
500
FIVE techniques used to separate Mixtures.
What are Filtration, Distillation, Crystallization, Sublimation, and Chromatography? (Sample Memorization Technique: "CSCFD," or "Computer Science Career Field Day").
500
A LAW that states that THE SAME compound is always composed of THE SAME elements, in THE SAME proportion by mass (whatever the sample size).
What is the LAW OF DEFINITE PROPORTIONS?
500
A physical, conceptual, or mathematical representation of experimental data.