Vocab
a separation technique that produces pure solid particles of a substance from a solution that contains the dissolved substance
Crystallization
a chemical combination of two or more different elements
compound
a property that remains the same no matter how much of a substance is present __
intensive property
a characteristic of matter that can be observed or measured without changing the sample’s composition
physical property
Distinguish between heterogeneous and homogeneous mixtures.
Answers may vary
a technique that uses a porous barrier to separate a solid from a liquid
filtration
a physical blend of two or more pure substances in any proportion in which each substance retains its individual properties
mixture
The ability or inability of a substance to combine with or change into one or more new substances
chemical property
Give an example of a heterogeneous mixture
answers may vary
Distinguish between a chemical change and a physical change.
Physical change= changes shape
Chemical change= changes composition
the energy-requiring process by which a solid changes directly to a gas without first becoming a liquid
sublimation
a pure substance that cannot be broken down into simpler substances by physical or chemical means
element
a property, such as mass, length, and volume, that is dependent upon the amount of substance present
extensive property
Give an example of a homogeneous mixture
answers may vary
List the three common states of matter, and give the definition of each.
liquid, solid, gas
a technique that can be used to physically separate most homogeneous mixtures based on the differences in the boiling points of the substances
distillation
a uniform mixture that can contain solids, liquids, or gases; also called a homogeneous mixture
solution
A(n) ____________ is a transition from one state of matter to another
phase change
Give an example of an element
answers may vary
State the law of conservation of mass.
can't create or destroy matter
technique that is used to separate the components of a mixture based on the tendency of each component to travel or be drawn across the surface of a fixed substrate
chromatography
A percentage determined by the ratio of the mass of each element to the total mass of the compound is called the ______.
percent by mass
A __ is a gaseous state of a substance that is a liquid or a solid at room temperature.
vapor