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     vocab week 1-1  
    1. independent variable - the variable that is intentionally changed
    2. dependent variable - the event studied and expected to change
    3. control - event that is used as an unchanging standard of comparison
    4. unitany - division of quantity accepted as a standard
    5. Kilo - 1000
    6. Hecto - Hundred
    7. Deci - Tenth
    8. Centi - Hundreth
    9. Milli -     Thousandth
    10. Deka - Ten

     

     vocab week 1-2 
    1. Matter - has mass and takes up space
    2. Density - the amount of mass per unit of volume
    3. Solid - state of matter that has a definite shape and volume
    4. Mass - a measure of the amount of matter in a sample
    5. Liquid - state of matter that has a definite volume but not a definite shape
    6. Freezing point - the temperature at which a liquid becomes a solid
    7. Melting point - the temperature at which a solid becomes a liquid
    8. Sublimation - the act of a solid becoming a gas with no apparent liquid state in between
    9. Condensation - the act of a gas cooling and becoming a liquid
    10. Boiling point - the temperature at which a liquid becomes a gas

     vocab week 1-3 

    1. Endothermic – a chemical reaction that absorbs heat
    2. Energy – the capacity of a body or system to do work
    3. Exothermic – a chemical reaction that releases heat
    4. Extensive – a property that depends on how much material is present
    5. Intensive – a property that does not depend on how much material is present
    6. Physical change – the substance does not change; can be reversed
    7. Precipitate – to separate a solid from a solution
    8. Quantitative – distinctions based on quantity
    9. Chemical change – a new substance is formed; cannot be reversed
    10. Qualitative – distinctions based on quality or qualities

     

     vocab week 1-4 
    1. Mixture - combinations of two or more pure substances that are not chemically combined
    2. Solute - the substance dissolved in a given solution
    3. Alloy - a homogeneous mixture of metals
    4. Aqueous solution - a solution in water
    5. Solvent - a substance that dissolves another to form a solution
    6. Substance - physical matter or material
    7. Homogeneous - same composition throughout
    8. Heterogeneous - the mixture is not uniform in composition
    9. Element - a class of substances that cannot be separated into simpler substances by chemical means
    10. Pure substance - a type of matter in which all samples are made of the same atoms or molecules

     

     
     
     
    vocab week 1-5 
    1. Periodic table – table in which the chemical elements are arranged according to their atomic numbers and shown in related groups
    2. Family/group – columns of the periodic table, elements have similar chemical properties and electronic structures
    3. Period – rows of the periodic table
    4. Alkali metals – group 1, highly reactive, most reactive metals (only need to lose one electron to become stable)
    5. Alkali earth metals – group 2, less reactive than group 1 but still very reactive
    6. Transition metals – groups 3 – 12, individual elements can have different numbers of valence electrons.
    7. Metalloids – an element that has both metallic and nonmetallic properties
    8. Halogens – group 17, highly reactive, most reactive non-metals (only need to gain 1 electron to become stable)
    9. Noble gasses – group 18, nonreactive
    10. Periodic trends – the tendencies of certain elemental characteristics to increase or decrease as one progresses along a row or column

      

    vocab week 1-6

    1. Proton - a positively charged elementary particle found in the nucleus of an atom.
    2. Neutron - a neutral elementary particle found in the nucleus of an atom.
    3. Electron – a negatively charged elementary particle found outside the nucleus of an atom.
    4. Nucleus – the positively charged mass within an atom, composed of neutrons and protons, and possessing most of the mass but occupying only a small fraction of the volume.
    5. Electron cloud – A space in which electrons are likely to be found.
    6. Isotope – an atom of an element with a different number of neutrons.
    7. Average atomic mass – a calculation of the average mass of an element based on the abundance of isotopes.
    8. Abundance – the amount of each type of isotope of a chemical element as naturally found on a planet.
    9. Bohr’s model – model of an atom with a positively charged nucleus holding most of the atoms mass surrounded mostly by empty space with electrons orbiting in fixed levels or orbits.
    10. Wave model – model of an atom with a positively charged nucleus holding most of the atoms mass surrounded mostly by empty space with electrons found in a general area based on their amount of energy.