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25 terms

Apologia Biology Module 5#

Definitions from Module 5# in Apologia Biology.
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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 the 3 forms - solid, liquid, or gas - which every substance is capable of attaining.
Diffusion
The random motion of molecules from one area of high concentration to an area of low concentration.
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 phosphorus
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.
Dehydration Process
A chemical reaction in which molecules combine by removing water.
Hydrolysis
Breaking down complex molecules by the addition of water.
Hydrophobic
Lacking any affinity to water.
Saturated Fat
A lipid made from fatty acids that have no double bonds between carbohydrates.
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 in specific molecules.
Polysaccharides
Carbohydrates that are made up of more than two monosaccharides
Concentration
A measurment of how much solute exists within a certain volume of solvent