DE Science
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Chemical Change | A change in a substance that changes it's identity.
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| Chemical Property | Any characteristic of a material that indicates it can undergo a certain chemical change.
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| Colloid | Heterogeneous mixture with particles that never settle and that are large enough to scatter light.
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| Compound | Two or more elements chemically combined, can only be separated by chemical means.
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| Distillation | a process used to separate two substances in a mixture by evaporating a liquid and recondensing it's vapor.
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| Element | Matter containing the same kinds of atoms.
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| Heterogeneous mixture | Mixture w/ easily distinguishable materials.
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| Homogenous Mixture | Mixture w/ non-distinguishable materials blended evenly throughout.
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| Law of Conservation of Mass | the total mass of all reactants in a chemical reaction is equal to the total mass of all products formed
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| Mixture | two or more substances physically combined, can easily be separated by physical means
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| Physical Change | any change in size, shape, or state of matter in which the identity of the substance remains the same
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| Physical property | any characteristic of a material that can be observed without changing the identity of the substance
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| Solution | homogenous mixture containing microscopic particles in a liquid that remain uniformly and constantly mixed
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| Substance | type of matter w. fixed composition.
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| Suspension | heterogeneous mixture containing visible particles in a liquid that will settle out over time
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| Tyndall Effect | scattering of light by colloid particles.
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| Acid | any substance that produces hydrogen ions, H+, in a water solution
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| Amino acid | building blocks of proteins, made up of carbon, oxygen, nitrogen, hydrogen, and sometimes sulfer
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| atom | the smallest particle of an element that still retains the properties of that element
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| Base | any substance that produces hydroxide ions, -OH, in a water solution
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| Carbohydrate | complex molecule formed by condensation, made up of carbon, hydrogen, and oxygen atoms in a ratio of 2 H atoms and 1 O atom for every C atom
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| Compound | a substance containing two or more elements chemically combined
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| Covalent bond | a bond formed between two or more atoms that are sharing electrons
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| Diffusion | the movement of substances from an area of high concentration to low concentration
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| Dynamic equilibrium | equal movement of substances across a membrane
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| Element | Matter containing the same kinds of atoms.
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| Enzyme | a protein that changes the rate of a chemical reaction involved in nearly all metabolic processes
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| Ionic Bond | a bond formed between oppositely charged ions in an ionic compound
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| ion | a charged particle that either has more of fewer electrons that protons
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| Isomer | compound with identical chemical formulas but different molecular structures and shapes
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| Isotope | atoms of same element that have different numbers of neutrons
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| lipid | large biomolecules made of fatty acids, mostly carbon and hydrogen + small amounts of oxygen, that are nonpolar thus insoluble in water
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| Metabolism |
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| Hydrogen bond |
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| Mixture | two or more substances physically combined, can easily be separated by physical means
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| Molecule | two or more atoms chemically combined
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| Nucleic acid | polymers made of nucleotides, stores cellular information in the form of a code
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| Nucleotide |
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| nucleus |
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| peptide bond | covalent bond formed between amino acids
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| pH | a measure of the concentration of hydronium ions in a solution using a scale ranging from 0-14, with 0 being the most acidic and 14 being the most basic
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| polar molecule | a molecule with a slightly positive and slightly negative end as a result of electrons being shared unequally
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| polymer | class of natural or synthetic substances made up of many smaller, simple molecules, called monomers, arranged in large chains
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| Protein | large complex polymer formed when amino acids bond together in long chains, combine when an H+ ion from the amino group of one amino acid and an -OH ion from the carboxyl group of another amino acid are removed to form a water molecule resulting in the tw
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| solution | homogenous mixture containing microscopic particles in a liquid that remain uniformly and constantly mixed
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