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TRBC Bio M5 Terms

Module 5 Terms

QuestionAnswer
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 acros 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, sulfer, 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.
Monosaccharides Simple carbohydrates that contain 3-10 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 breaking down complex molecules by the chemical addition of water.
Hydrophobic Lacking any affinity to water.
Saturated fat A lipid made from fatty acids tht have no double bonds between carbon attoms.
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 molecules.
Created by: sdushaw
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