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| Ann organized set of investigation procedures |
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| A possible explanation for a problem using what you know and what you observe |
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| tests the effect of one thing on another using controlled conditions |
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| a factor that can cause a change in the results of an experiment |
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| the variable you can change to see how it will affect the dependent variable |
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| A factor that does not change when other variables change |
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| I the standard by which the test results can be compared |
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| Occurs when scientists expects changes how the results are viewed |
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| Represents an idea, event, or object to help people better understand |
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| An explanation of things or events based on knowledge gained from many observations and investigations |
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| A statement about what happens in nature and that seems to be true all the time |
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| The application of science to help people |
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| Describes how closely measurements are to each other and how carefully measurements were made. |
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| Compares a measurement to the real or accepted value |
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| The amount of space occupied by an object |
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| A measurement of the quantity of matter in an object |
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| The mass per unit volume of an object |
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| A visual display of information or data |
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| Agricultural biotechnology |
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| A collection of scientific techniques, including genetic engineering, that are used to create, improve, or modify plants, animals, and microorganisms |
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| A group of people that share similar values and beliefs. |
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| A researcher who is responsible for bringing technology to the consumer |
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| Design restrictions for products from outside factors |
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| Uses a computer to imitate the process to collect data or to test a process or procedure. |
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| A full-scale model that is used to test a new product |
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| A smaller version of the real production equipment that Closely models actual manufacturing conditions |
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| A device or collection of devices that monitors a system. |
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| The force that acts in the opposite direction to the motion of a surface sliding on another surface. |
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| The motion of the particles in matter is described by kinetic energy |
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| A substance is a measure of the average kinetic energy of its particles |
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| The SI unit for temperature is the kelvin |
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| The sum of the kinetic and potential energies of all the particles in an object |
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| Thermal energy that flows from something at a higher temperature to something with a lower temperature |
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| The amount of thermal energy needed to raise the temperature of 1 Kg of some material by 1oC is called specific heat. |
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| Matter consisting of positively and negatively charged particles and does not have a definite shape or volume. |
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| The amount of energy required to change 1Kg of a substance from a solid to a liquid at its melting point. |
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| The amount of energy required for 1Kg of the liquid at its boiling point to become a gas. |
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| A type of matter with a fixed composition. |
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| All the atoms in a substance have the same identity, that substance is an element. |
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| A pure substance in which the atoms of two or more elements are combined in a fixed proportion |
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| A mixture in which different materials can be distinguished easily |
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| Contains two or more gaseous, liquid, or solid substances blended evenly throughout |
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| A homogeneous mixture of particles so small that they cannot be seen with a microscope and will never settle to the bottom of their container |
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| A type of mixture with particles that are larger than those in solutions but not heavy enough to settle out |
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| The scattering of light by colloidal particles |
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| Pond water is a suspension |
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| Color, shape, size, density, melting point, and boiling point |
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| A change in Size, Shape, Or state of matter |
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| A characteristic of a substance that indicates whether it can undergo a certain chemical change |
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| The process used for separating substances in a mixture by evaporating a liquid and recondensing its vapor |
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| A change of one substance to another |
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| Law of Conservation of Mass |
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| The mass of all substances that are present before a chemical change equals the mass of all the substances that remain after the change |
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| The smallest piece of matter that still retains the property of the element |
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| Surrounded by a cloud containing electrons |
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| Particles with an electrical charge of 1+ |
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| Neutral particles that do not have an electrical charge |
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| Particales with an electrical of 1- |
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| are made up of smaller particles |
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| the area around the nucleus of an atom where its electron are most likely found. |
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| The number of protons in an atom is equal to a number called atomic number |
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| An atom is the sum of the number of protons and the number of neutrons in the nucleus of the atom |
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| Atoms of the same element that have different number of neutrons |
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| An element is the weighted-average mass of the mixture of its isotopes |
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| an arrangements of element by the increasing of the mass number |
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| The vertical columns in the periodic table |
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| Uses the symbol of the element and dots to represent the electrons in the outer energy level. |
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| The horizontal columns on the periodic table |
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| tells what elements a compound contains and the exact number of the atoms of each element in a unit of that compound |
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| The force that holds atoms together in a compound |
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| The force of attraction between the opposite charges of the ions in an ionic bond |
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| The attractions that form between atoms when they share electrons |
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| A neutral particle that forms as a result of electron sharing |
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| One that has a slightly posotive end a slightly negative end |
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| One which electrons are shared equally |
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| A positively or negatively charge, covalently bonded group of atoms |
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| A compound that has water chemically attached to its ions and written into its chemical formula |
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| a charge in which one or more substances are converted into new substances |
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| The substances that react |
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| The new substance produced |
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| A way to describe a chemical reaction using chemical formulas and other symbols |
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| Balanced chemical equation |
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| Changing coefficients in a reaction to acheive |
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| Two or more substances combine to form another substance |
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| Occurs when one substance breaks down, or decomposes, into two or more substances. |
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| Single-displacement reaction |
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| When one element replaces another element in a compound |
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| Double-displacement reation |
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| The positive ion of one compound replaces the positive ion of the other to form two new compounds |
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| this minimum amount of energy needed to start a reaction |
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| When the energy needed is in the form of heat. |
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| When the energy given off in a reaction is primarily in the form of heat. |
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| The speed at which reactants are consumed and products are produced in a given reaction |
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| A substance that speeds up a chemical reaction without permanently changing itself |
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| Substances that are used to slow down a chemical reaction |
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| The substance being disolved |
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| The substance doing the dissolving |
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| A solution in which water is the solvent |
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| A mixture that has the same composition, color density, and even taste throughout. |
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| Describes how much solute is present in a solution compared to the amount of solvent |
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| A solution that contains all the solute it can hold at a given temperature |
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| Any solution that can dissolve more solute at a giventemperature |
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| Contains more solute than a saturated solution at the same temperature |
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| A substance that produces hydrogen ions in a water solution |
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| An organic compound that changes color in acid and bases |
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| Any substance that forms hydroxide ions in a water solution |
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| Dissolved in water, almost 100% Of the acid molecules dissociate into ions |
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| Only a small fraction of the acid molecule dissociate into ions |
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| Dissociate completely in a solutioin |
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| Does not dissociate completely |
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| A solution is a measure of the concentration of H+ions in it |
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