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State of matter that has definite shape and volume.
Solid
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State of matter that has definite volume and changeable shape.
Liquid
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State of matter that has changeable shape and volume.
Gas
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Energy in action.
Kinetic energy
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Stored energy; energy of position.
Potential energy
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Form of energy stored in the bonds of chemical substances (between atoms & molecules).
Chemical energy
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Form of energy in the movement of charged particles.
Electrical energy
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Form of energy directly involved in moving matter (involving movement).
Mechanical energy
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Form of energy in (electromagnetic) waves.
Radiant energy
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Conversion of energy forms releases ____.
heat
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How many nanometers in one meter?
1 billion
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The number of ____defines the element.
protons
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98.5% of the human body is made up of these elements.
- Oxygen, Carbon, Hydrogen, Nitrogen, Calcium, Phosphorus
- (OCHNCaP)
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The human body is 60-70% ____.
water (H2O)
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These elements are stored in the bones of the body.
Calcium & Phosphorus
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An electroneutral atom has an ___ number of protons as electrons.
equal
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How big is the nucleus of an atom?
10-15 m
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Which element doesn't have a neutron?
Hydrogen
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The sum of atomic weights of atoms.
Molecular weight
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An isotope has a change in the number of ____.
Neutrons
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The "decimal" weight listed under the element in the periodic table is ___.
Average weight of all isotopes.
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Half of a substance has degraded to something else over a certain period of time.
Half-life
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Chemical bond (combination) of 2 or more of the same element.
Molecule
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A chemical bond (combination) of 2 or more different elements.
Compound
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The smallest particle of a compound that still exhibits the specific characteristics of a compound.
Molecule
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Combination that is physically intermixed (not chemical) and is easily separable by non-chemical means.
Mixture
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A mixture containing a solvent and a solute (particles < 1 nm in size) that is transparent and remains mixed.
Solution
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Mixture of protein and water; changes from liquid to gel withing and between cells' cloudy and remains mixed.
Colloid
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Mixture in which particles are >100 nm, is cloudy or opaque in appearance, and separates on standing (lighter stuff on the top, heavier stuff on the bottom).
Suspension
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Suspension of one LIQUID in another (not particles).
Emulsion
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moles of solute/liters of solution
molarity
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Weight of solute in given volume of solution.
Weight per Volume
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Weight/volume of solute in solution.
Percentage
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Molecular weight in grams of that molecule, compound, or element.
1 mole
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Avogadro's number
6.02 x 1023
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Concentration in which the # of molecules is unequal and the weight of solute is equal.
Percentage
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Concentration in which the # of molecules is equal and the weight of solute is unequal.
Molar
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Outermost orbital where the bonding action is.
Valence shell
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Rule stating 8 electrons in the outer shell makes the element stable.
Octet rule
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An energy relationship between electrons in the reacting toms.
Chemical bond
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Another word for stable.
Inert
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Another word for unstable.
Reactive
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Type of bond involving the transfer or exchange of electrons.
Ionic bond
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Type of bond involving the sharing of electrons.
Covalent bond
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Type of bond involving an attraction between covalently linked H+ and negative pole of another molecule.
Hydrogen bond
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Different from one side to another; asymmetrical.
Polarity
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Carry a charge due to an unequal number of protons and electrons.
Ions
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The transfer of electrons from one atom to another (involving ions).
Ionization
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What are the strongest bonds? Why?
Covalent bonds; they do not dissociate in water.
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Symmetrical; the same on one side as the other.
Nonpolar
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Water contains what type of bond?
Hydrogen bond
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Properties of water (H2O)
- Liquid is denser than solid (so ice floats)
- Surface tension
- Adhesion & cohesion
- High heat capacity
- High heat of vaporization
- Polar
- Protective cushion around organs
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A chemical reaction involving the breaking down of components.
Catabolic (Decomposition)
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A chemical reaction involving the combining of components.
Anabolic (Synthesis)
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Classes of reactions
- Decomposition
- Synthesis
- Exchange
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Singular, similar subunit.
Monomer
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Group of monomers.
Polymer
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What determines the direction of a reaction?
Law of Mass Action (side of equation with greater quantity of reactants dominates)
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The gaining of a negative charge, the gaining of an electron.
Reduction
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The gaining of a positive charge, the loss of an electron.
Oxidation
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Reactions in which electrons are often transferred as hydrogen atoms.
Oxidation-reduction (redox) reactions.
-
-
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Reaction rate is affected by...
- Concentration
- Temperature
- Catalysts (enzymes)
- Size of particles
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Reaction are due to molecular motion, or ____.
collisions
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Biochemistry not involving carbon.
Inorganic
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Biochemistry involving carbon.
Organic
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Elements of a carbohydrate.
CHO
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Fat cells are _____% water.
20-40%
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Why does water make a great solvent?
It is polar.
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Absorbing and releasing a certain amount of heat before changing temperature.
Heat capacity
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Taking a certain amount of energy (heat) to break the (hydrogen) bonds between H2O molecules.
Heat of vaporization
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Why do salts separate in water?
The polar nature of water overpowers the ionic bond of the salt.
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Ionic compound containing cation (not H+) and anion (not OH-); dissociates into components in water.
Salt
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Dissociates in water and yields H+ and anions; low on pH scale; proton (H+) donor.
Acid
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Dissociates in water and yields OH- and cations; high on pH scale; proton (H+) acceptor.
Base
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Each level on pH scale is a ____ change.
10x (10 times)
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This element is electroneutral and small.
Carbon
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The removing of water to combine monomers into polymers (aka polymerization).
Dehydration Synthesis
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The addition of water to break apart polymers into monomers.
Hydrolysis
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What does CHO mean?
Carbohydrate
-
-
Water-fearing
Hydrophobic
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The general formula for carbs (sugars).
(CH2O)n (n=the number of carbon atoms)
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Carbs disperse ___ in water.
evenly
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Are carbs hydrophilic or hydrophobic?
Hydrophilic
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General formula for monosaccarides.
C6H12O6
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glucose + fructose
sucrose (table sugar)
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glucose + galactose
lactose (sugar in milk)
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glucose + glucose
maltose (sugar in grain products)
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energy storage in plants (a polysaccharide)
starch
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structural molecule of plant cell walls; not digestible by humans (we cannot break it down)
cellulose
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energy storage in animals; liver synthesizes after a meal and breaks down between meals
glycogen
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____ are sweet to taste; ____ cannot be tasted
saccharides & disaccharides; polysaccharides
-
Are lipids hydrophobic or hydrophilic?
Hydrophobic
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Triglycerides "E" are composed of ____ joined to three ____ by means of ____.
Glycerol; fatty acids; dehydration synthesis
-
Phospholipids have ____ heads and ____ tails.
Hydrophobic (lipid) ; hydrophilic (phosphate)
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What are the main storage of fats (the most efficient fuel system and nonpolar)?
Triglycerides
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All ____ are derived from cholesterol.
Steroids
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Hormone-like chemical between cells.
Eicosanoids
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Important component of cell membranes (for rigidity).
Cholesterol
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Helps with "fight" or "flight"
corticol
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The ____ of the protein is important to the way it operates.
shape
-
Determines the structure and thus function of proteins.
Amino acids
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The properties of the amino acids are determined by the ___ group.
R - "radical"
-
A dipeptide is two ____ held together by a _____.
amino acids; peptide bond
-
The 4 shapes of proteins:
- Primary
- Secondary
- Tertiary
- Quarternary
-
This protein is a quaternary shape; a conjugated protein; contains a ring called a "heme moiety"
Hemoglobin
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These protein groups are where oxygen is kept/
"Heme groups"
-
Lower the activation energy required to get a chemical reaction to take place; are used over and over again (there is no breakdown).
Enzymes
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Are highly specific (there is only one for a certain reaction).
Enzymes
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Reactions occur at astonishing speed (millions of molecules per minute).
Enzyme reaction
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We modify what is going on by the __________ available.
Number of enzymes
-
______ enables other enzymes to work.
Fever (temperature)
-
Can be moderated by the presence or lack of enzymes.
Regulation
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Amino acids that you can get from other amino acids (the body can produce them).
Nonessential amino acids
-
Nucleotides contain:
- a pentose sugar
- phosphate group
- nitrogen-containing base (A, G, C, U, T)
-
DNA must ______ before it _____.
replicate; divides
-
The structure of DNA.
Double-helix
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Is made from DNA and is much shorter; made in teh nucleus but find the themselves out into the cytoplasm.
RNA
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A nucleotide that is the energy currency of the body.
ATP
-
A _____ group is added to ADP to make ___; it is made on an as-needed basis and used up in about _____ seconds.
phosphate; ATP; 60
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