2018 Mod5 Flashcards
(49 cards)
Matter:
anything that has mass and takes up space
Model:
An explanation or re-presentation 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 make up of a substance
Chemical change
A change that alters the make up 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 salute exist within a certain volume of solvent
Semipermeable membrane:
A membrane that allows 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 affects 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, phosphorus, and sulfur.
Biosynthesis:
The process by which living organisms produce larger molecules from smaller ones
Isomers:
Two different molecules that have the same chemical formula
Monosaccharides:
Simple carbohydrates that contain 3 to 10 carbon atoms.
Disaccharides:
Carbohydrates that are made up of two monosaccharides
Polysaccharides:
Carbohydrates that are made up of more than two monosaccharides
Dehydration reaction:
A chemical reaction in which molecules combined by removing water
Hydrolysis
Breaking down of complex molecules by chemical addition of water
Hydrophobic
Lacking any affinity to water
Saturated fat:
A lipid made from acid’s that have no double bonds between carbon and atoms
Unsaturated fat:
A lipid made from fatty acid’s that have at least one double bond between carbon atoms
Peptide bond:
A bond that links amino acids together in a protein
