Terms : Hide Images
| 7135351281 | Archaea | one of two prokaryotic domains, the other being Bacteria | 0 | |
| 7135351282 | Biology | the scientific study of life | 1 | |
| 7135351598 | Controlled Experiment | an experiment in which an experimental group is compared with a control group that varies only in the factor being tested | 2 | |
| 7135351602 | Data | recorded observations | 3 | |
| 7135351810 | DNA | a double-stranded, helical nucleic acid molecule capable of being replicated and determining the inherited structure of a cell's proteins. | 4 | |
| 7135351811 | Emergent Properties | new properties that arise with each step upward in the hierarchy of life | 5 | |
| 7135352094 | Eukarya | the domain that includes all eukaryotic organisms | 6 | |
| 7135352095 | Eukaryotic Cell | a type of cell with a membrane-enclosed nucleus and membrane-enclosed organelles. | 7 | |
| 7135352261 | Evolution | descent with modification; the idea that living species are descendants of ancestral species that were different from the present-day ones | 8 | |
| 7135352262 | Genes | a discrete unit of hereditary information consisting of a specific nucleotide sequence in DNA | 9 | |
| 7135352498 | Hypothesis | a testable explanation for a set of observations based on the available data and guided by inductive reasoning | 10 | |
| 7135352848 | Inductive Reasoning | a type of logic in which generalizations are based on a large number of specific observations | 11 | |
| 7135352849 | Inquiry | the search for information and explanation, often focusing on specific questions | 12 | |
| 7135353021 | Natural Selection | a process in which individuals that have certain inherited traits tend to survive and reproduce at higher rates than other individuals because of those traits | 13 | |
| 7135353022 | Negative Feedback | a form of regulation in which accumulation of an end product of a process slows the process | 14 | |
| 7135353023 | Positive Feedback | a form of regulation in which an end product of a process speeds up that process | 15 | |
| 7135353335 | Prokaryotic Cell | a type of cell lacking a membrane-enclosed nucleus and membrane-enclosed organelles | 16 | |
| 7135353336 | Science | an approach to understanding the natural world | 17 | |
| 7135353534 | Theory | an explanation that is broader in scope than a hypothesis, generates new hypotheses, and is supported by a large body of evidence | 18 | |
| 7136332665 | Anion | a negatively charged ion | 19 | |
| 7136332908 | Atom | the smallest unit of matter that retains the properties of an element | 20 | |
| 7136332909 | Atomic mass | the total mass of an atom | 21 | |
| 7136332910 | Atomic number | the number of protons in the nucleus of an atom, unique for each element | 22 | |
| 7136333238 | Cation | a positively charged ion | 23 | |
| 7136333239 | Chemical bond | an attraction between two atoms, resulting from a sharing of outer-shell electrons or the presence of opposite charges on the atoms | 24 | |
| 7136333240 | Compound | a substance consisting of two or more different elements combined in a fixed ratio | 25 | |
| 7136333570 | Covalent bond | a type of strong chemical bond in which two atoms share one of more pairs of valence electrons | 26 | |
| 7136333571 | Electron shell | an energy level of electrons at a characteristic average distance from the nucleus of an atom | 27 | |
| 7136333966 | Electron | a subatomic particle with a single negative electrical charge | 28 | |
| 7136333967 | Element | any substance that cannot be broken down to any other substance by chemical reactions | 29 | |
| 7136334233 | Essential elements | a chemical element required for an organism to survive, grow, and reproduce | 30 | |
| 7136334234 | Hydrogen bond | a type of weak chemical bond that is formed when the slightly positive hydrogen atom of a polar covalent bond in one molecule is attracted to the slightly negative atom of a polar covalent bond in another molecule or in another region of the same molecule | 31 | |
| 7136334235 | Ion | an atom that has gained or lost one or more electrons, thus acquiring a charge | 32 | |
| 7136334236 | Ionic bond | a chemical bond resulting from the attraction between oppositely charged ions | 33 | |
| 7136334885 | Molecule | two or more atoms held together by covalent bonds | 34 | |
| 7136334886 | Neutron | a subatomic particle having no electrical charge found in the nucleus of an atom | 35 | |
| 7136335319 | Product | a material resulting from a chemical reaction | 36 | |
| 7136335320 | Proton | a subatomic particle with a single positive electrical charge found in the nucleus of an atom | 37 | |
| 7136335321 | Reactant | a starting material in a chemical reaction | 38 | |
| 7136335674 | Trace element | an element indispensable for life but required in extremely minute amounts | 39 | |
| 7136335675 | Valence electron | an electron in the outermost electron shell | 40 | |
| 7136336054 | Van der Waals interactions | Weak attractions between molecules or parts of molecules that result from transient local partial charges | 41 | |
| 7137103354 | Acid | a substance that increases the hydrogen ion concentration of a solution | 42 | |
| 7137103355 | Adhesion | the clinging of one substance to another, such as water to plant cell walls by means of hydrogen bonds | 43 | |
| 7137103945 | Base | a substance that reduces the hydrogen ion concentration of a solution | 44 | |
| 7137103946 | Buffer | a solution that contains a weak acid and its corresponding base; it minimizes changes in pH when acids or bases are added to the solution | 45 | |
| 7137104485 | Cohesion | the linking together of like molecules, often by hydrogen bonds | 46 | |
| 7137104874 | Hydrophilic | an affinity for water | 47 | |
| 7137104875 | Hydrophobic | having no affinity for water | 48 | |
| 7137105179 | Hydronium ion | a water molecule that has an extra proton bound to it (H30+, commonly represented as H+) | 49 | |
| 7137105180 | Hydroxide ion | a water molecule that has lost a proton, OH- | 50 | |
| 7137105830 | pH | a measure of hydrogen ion concentration equal to -log [H+] and ranging in value from 0-14 | 51 | |
| 7137106339 | Solution | a liquid that is a homogeneous mixture of two or more substances | 52 | |
| 7137106340 | Solvent | the dissolving agent of a solution | 53 | |
| 7137106603 | Specific heat | the amount of heat that must be absorbed or lost for 1 g of a substance to change its temperature by 1 degree Celsius | 54 | |
| 7137106604 | Surface tension | a measure of how difficult it is to stretch or break the surface of a liquid | 55 | |
| 7139632873 | Adenosine triphosphate (ATP) | an adenine-containing nucleoside triphosphate that releases free energy when its phosphate bonds are hydrolyzed | 56 | |
| 7139632874 | Amino group | a chemical group consisting of a nitrogen atom bonded to two hydrogen atoms | 57 | |
| 7139634485 | Carbonyl group | a chemical group present in aldehydes and ketones and consisting of a carbon atom double-bonded to an oxygen atom | 58 | |
| 7139634486 | Carboxyl group | a chemical group present in organic acids and consisting of a single carbon atom double-bonded to an oxygen atom and also bonded to a hydroxyl group | 59 | |
| 7139635077 | Functional group | a specific configuration of atoms commonly attached to the carbon skeletons of organic molecules and involved in chemical reactions | 60 | |
| 7139635078 | Hydrocarbon | an organic molecule consisting only of carbon and hydrogen | 61 | |
| 7139635649 | Hydroxyl group | a chemical group consisting of an oxygen atom joined to a hydrogen atom. Molecules possessing this group are soluble in water and are called alcohols. | 62 | |
| 7139635650 | Isomer | one of several compounds with the same molecular formula but different structures and therefore different properties. | 63 | |
| 7139635651 | Methyl group | a chemical group consisting of a carbon bonded to three hydrogen atoms. | 64 | |
| 7139636049 | Organic chemistry | the study of carbon compounds | 65 | |
| 7139636439 | Phosphate group | a chemical group consisting of a phosphorous atom bonded to four oxygen atom | 66 | |
| 7147690792 | Amino acid | an organic molecule possessing both a carboxyl and an amino group; serve as the monomers of polypeptides | 67 | |
| 7147690793 | Antiparallel | referring to the arrangement of the sugar-phosphate backbones in a DNA double helix (they run in opposite 5' to 3' directions) | 68 | |
| 7147691050 | Carbohydrates | a sugar (monosaccharide) or one of its dimers (disaccharide) or one of its polymers (polysaccharide) | 69 | |
| 7147691051 | Catalysts | a chemical agent that selectively increases the rate of a reaction without being consumed by the reaction | 70 | |
| 7147691052 | Cellulose | a structural polysaccharide of plant cell walls, consisting of glucose monomers joined by beta-glycosidic linkages | 71 | |
| 7147691250 | Chaperonin | a protein complex that assists in the proper folding of other proteins | 72 | |
| 7147691251 | Chitin | a structural polysaccharide, consisting of amino sugar monomers, found in many fungal cell walls and in the exoskeletons of all arthropods | 73 | |
| 7147691252 | Cholesterol | a steroid that forms an essential component of animal cell membranes and acts as a precursor molecule for the synthesis of other biologically important steroids, such as many hormones | 74 | |
| 7147691499 | Dehydration reaction | a chemical reaction in which two molecules become covalently bonded to each other with the removal of a water molecule | 75 | |
| 7147691897 | Denaturation | in proteins, a process in which a protein loses its native shape due to the disruption of weak chemical bonds and interactions, thereby becoming biologically inactive | 76 | |
| 7147691898 | Deoxyribose | the sugar component of DNA nucleotides, having one fewer hydroxyl group than ribose | 77 | |
| 7147692171 | Enzyme | a macromolecule (usually a protein) that serves as a catalyst | 78 | |
| 7147693386 | Fat | a lipid consisting of three fatty acids linked to one glycerol molecule; also called a triglyceride | 79 | |
| 7147693387 | Gene | a discrete unit of hereditary information consisting of a specific nucleotide sequence in DNA | 80 | |
| 7147693388 | Glycosidic linkage | a covalent bond formed between two monosaccharides by a dehydration reaction | 81 | |
| 7147693842 | Glycogen | an extensively branched glucose storage polysaccharide found in the liver and muscle of animals | 82 | |
| 7147693843 | Hydrolysis | a chemical reaction that breaks bonds between two molecules by the addition of water | 83 | |
| 7147694055 | Lipid | any of a group or large biological molecules, including fats, phospholipids, and steroids, that mix poorly, if at all, with water | 84 | |
| 7147694545 | Monomer | the subunit that serves as the building block of a polymer | 85 | |
| 7147694546 | Nucleic acid | a polymer consisting of many nucleotide monomers; the two types are DNA and RNA | 86 | |
| 7147694547 | Nucleotide | the building block of a nucleic acid, consisting of a five-carbon sugar covalently bonded to a nitrogenous base and one or more phosphate groups | 87 | |
| 7147694794 | Peptide bond | the covalent bond between the carboxyl group on on amino acid and the amino group on another, formed by a dehydration reaction | 88 | |
| 7147694795 | Phospholipid | a lipid made up of glycerol joined to two fatty acids and a phosphate group; they form bilayers that function as biological membranes | 89 | |
| 7147695232 | Polymer | a long molecule consisting of many similar or identical monomers linked together by covalent bonds | 90 | |
| 7147695233 | Protein | a biologically functional molecule consisting of one or more polypeptides folded and coiled into a specific three-dimensional structure | 91 | |
| 7147695628 | Ribose | the sugar component of RNA nucleotides | 92 | |
| 7147695629 | RNA | a type of nucleic acid consisting of a polynucleotide made up of nucleotide monomers with a ribose sugar and the nitrogenous bases A, C, G, and U | 93 | |
| 7147696161 | Starch | a storage polysaccharide in plants, consisting entirely of glucose monomers joined by alpha-glycosidic linkages | 94 | |
| 7147696162 | Triacylglycerol | a lipid consisting of three fatty acids linked to one glycerol molecule; also called a fat or a triglyceride | 95 | |
| 7147700205 | Steroid | a type of lipid characterized by a carbon skeleton consisting of four fused rings with various chemical groups attached | 96 | |
| 7147700206 | Polysaccharide | a polymer of many monosaccharides, formed by dehydration reactions | 97 | |
| 7147702472 | Monosaccharide | the simplest carbohydrate, active alone or serving as a monomer for disaccharides and polysaccharides | 98 | |
| 7147703644 | Fatty acid | a carboxylic acid with a long carbon chain; three of these linked to a glycerol molecule form a fat molecule | 99 |
