7th grade science 9 Flashcards
Chemical property
Characteristic that cannot be observed without changing a substance
Physical property
Characteristic that the observed without changing or trying to change the substance
Chemical change
A change that happens when substances are changed into different substances
Condensation
Change from a gas into a liquid
Deposition
Process by which a gas changes directly into a solid without becoming a liquid first
Law of conservation of mass
The total mass of matter is the same before and after physical or chemical changes
Physical change
The change in the way objects look, but not in what the object is made of
Sublimation
A change directly from a solid to a gas without becoming a liquid first
Heterogeneous mixture
A mixture where the substances are not mixed evenly
Homogeneous mixture
A mixture that has two or more substances in which the molecules mix evenly, but do not bind together
Precipitate
A solid that forms when solutions are mixed in a chemical change happens
Solute
The substance in a solution that dissolves, or seems to disappear
Solvent
The substance that dissolves the solute in a solution
Substance
Matter that has the same fixed makeup and properties throughout
Aqueous
The solution in which water is the solvent
