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7th Grade- Chapters 1-3 Chemical Interactions Book Test Review
 

7th Grade- Chapters 1-3 Chemical Interactions Book Test Review

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    7th Grade- Chapters 1-3 Chemical Interactions Book Test Review 7th Grade- Chapters 1-3 Chemical Interactions Book Test Review Presentation Transcript

    • Chapters 1-3 Review Game
    • Compound
      • A substance made of two or more elements chemically combined in a specific ratio, or proportion.
    • coefficients
      • You can balance a chemical change by changing the
    • physical change
      • A change that alters the form or appearance of a material but does not make the material into another substance.
    • Element
      • A substance that cannot be broken down into any other substances by chemical or physical means.
    • chemical reaction
      • The process in which substances undergo chemical changes that results in the formation of new substances.
    • pH scale
      • shows concentration of hydrogen ions in a solution
    • chemical change
      • A change in matter that produces a new substance.
    • solubility
      • Measure of how much solute can dissolve in a solvent at a given temperature
    • Solution
      • A well-mixed mixture.
    • mixture
      • Two or more substances that are mixed together but not chemically combined.
    • Molecule
      • combination of two or more atoms.
    • Chemical formula
      • A combination of the symbols that represent the elements in a compound.
    • chemical change
      • A change in matter that produces a new substance.
    • Chemical Bond
      • The force that holds atoms together.
    • Atom
      • smallest particle of an element.
    • Chemical Symbol
      • A one or two letter set of characters that is used to identify elements.
    • Precipitate
      • A solid that forms from a solution during a chemical reaction.
    • Chemical Equation
      • A short, easy way to show chemical reactions, using symbols instead of words.
    • neutralization
      • Reaction between an acid and a base producing water and a salt
    • Unsaturated
      • If you can continue to dissolve more solute in a solution, you have a(n) ________ solution.
    • Conservation of mass
      • The principle stating that matter is not created or destroyed during a chemical reaction.
    • Chemistry
      • The study of the properties of matter and how matter changes.
    • solute
      • The part of a solution that is present in the smaller amount
    • Subscript H 2 0
      • A number in a chemical formula that tells the number of the atoms in a molecule or the ratio of the elements in a compound.
    • suspension
      • mixture in which particles can be seen & easily separated by settling or filtration
    • Covalent bond
      • Chemical bond formed when two atoms share electrons
    • Synthesis
      • A chemical reaction in which two or more simple substances combine to form a new, more complex substance.
    • Products
      • A substance formed as a result of a chemical reaction.
    • Reactants
      • A substance that enters into a chemical reaction.
    • Coefficient
      • A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction.
    • Concentration
      • The amount of one material in a volume of another material.
    • Activation energy
      • The minimum amount of energy that has to be added to get a chemical reaction started.
    • Replacement reaction
      • A reaction in which one element replaces another in a compound; or when two elements in different compounds trade places.
    • Indicator
      • A compound that changes color when it comes in contact with an acid or a base
    • Exothermic reaction
      • A reaction that releases energy in the form of heat.
    • decomposition
      • A chemical reaction that breaks down compounds into simpler products.
    • Enzyme
      • A biological catalyst that lowers the activation energy of reactions in cells.
    • Endothermic reaction
      • A reaction that absorbs energy in the form of heat.
    • Solvent
      • The part of a solution that is present in the larger amount.
    • Fuel
      • A material that releases energy when it burns.
    • Base #8-14 on the pH scale
    • Concentrated solution A mixture that has a lot of solute dissolved in it.
    • Solution
      • A very well mixed mixture.
    • fire prevention best form of fire safety
    • acid A substance that turns blue litmus paper red.
    • Acid A substance that turns blue litmus paper red.
    • Inhibitor
      • A material that decreases the rate of a chemical reaction.
    • base Feels slippery
    • Indicator
      • A compound that changes color when it comes in contact with an acid or a base
    • salt Any ionic compound made from the neutralization of an acid with a base.
    • neutral 7 on the pH scale
    • atomic number number of protons in the nucleus of an atom
    • Acid #0-6 on the pH scale
    • catalyst
      • A material that increases the rate of a chemical reaction by lowering the activation energy.
    • alloy
      • Material made of 2 or more elements that has the properties of a metal
    • matter
      • Anything that has mass and takes up space
    • Acid Tastes sour
    • Alkali metals Group 1
      • lower freezing point of solvent
      • raise boiling point of solvent
      2 effects of solutes on solutions
    • period row across the periodic table
    • Fuel, oxygen, heat 3 parts of the fire triangle
    • Noble gases Group 18
    • Combustion A rapid reaction between oxygen and fuel that results in fire.
    • Base A substance that turns red litmus paper blue.
    • Base Tastes bitter
    • digestion Process that breaks down complex molecules of food into smaller particles
    • group (or family) column on the periodic table
    • halogens
      • Group 17
    • malleable property that metal can be rolled into thin sheets or shapes
    • colloid mixture containing small, undissolved particles that do not settle out - particles large enough to scatter a beam of light
    • Dilute solution Mixture that has only a little solute
    • corrosive Eat away at other materials
    • ductile property that metal can be pulled into wire
    • hydrogen Element with 1 valence electron
    • Base A substance that turns red litmus paper blue.
    • Formation of a new substance Best evidence for a chemical reaction