Module #5 Vocabulary Flashcards
Matter
Anything that has mass and takes up space
Model
An explanation or representation of something that cannot be seen
Element
A collection of atoms that all have the same number of protons
Molecules
Chemicals that result from atoms linking together
Physical change
A change that affects the appearance but not the chemical makeup of a substance
Chemical change
A change that alters the makeup of the elements or molecules of a substance
Phase
One of three forms - solid, liquid, or gas – which every substance is capable of attaining
Diffusion
The random motion of molecules from an area of high concentration to an area of low concentration
Concentration
A measurement of how much solute exists within a certain volume of solvent
Semipermeable membrane
A membrane that allows some molecules to pass through but does not allow other molecules to pass through
Osmosis
The tendency of a solvent to travel across a semipermeable membrane into areas of higher solute concentration
Catalyst
A substance that alters the speed of a chemical reaction but is not used up in the process
Organic molecule
A molecule that contains only carbon and any of the following: hydrogen, oxygen, nitrogen, sulfur, and/or phosphorous
Biosynthesis
The process by which living organisms produce larger molecules from smaller ones
Isomers
Two different molecules that have the same chemical formula
