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25 terms

Study Guide for Module 5

Biology with Dr. J.L. While
STUDY
PLAY
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 element 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 alter the speed of a chemical reaction but is not sued up in the process
Organic molecule
A molecule that contains only carbon and any of the following: hydrogen, oxygen, nitrogen, sulfur, and/or phosphorus
Biosynthesis
The process by which living organisms produce larger molecules
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 combine by removing water
Hydrolysis
Braking down complex molecules by the chemical addition of water
Hydrophobic
Lacking any affinity to water
Saturated fat
A lipid made from fatty acids that have no double bonds between carbon atoms
Unsaturated fat
A lipid made from fatty acids that have at least one double bond between carbon atoms
Peptide bond
A bond that links amino acids together in a protein
Hydrogen bond
A strong attraction between hydrogen atoms and certain other atoms (usually oxygen or nitrogen) in specific