unit 4 research techniques. alat chapter 15 introduction to science and metrics
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Scientific Terminology Most scientific terms have a prefix, root and/or suffix, which makes them easier to understand – such as hyperglycemia Most scientific terms have a prefix, root and/or suffix, which makes them easier to understand – such as hyperglycemia Hyper- (more than) Hyper- (more than) Glyc (glucose) Glyc (glucose) -emia (blood) -emia (blood) ecto- (outside), ecto- (outside), endo- (inside), endo- (inside), -cide (killing), -cide (killing), -tomy, (to cut into), -tomy, (to cut into), bio- (life), bio- (life), -ology (the study of), -ology (the study of), patho- (disease) patho- (disease)TRANSCRIPT
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Unit 4Unit 4Research TechniquesResearch Techniques
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ALAT Chapter 15ALAT Chapter 15
Introduction to Science and Introduction to Science and MetricsMetrics
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Scientific TerminologyScientific Terminology Most scientific terms Most scientific terms
have a prefix, root have a prefix, root and/or suffix, which and/or suffix, which makes them easier to makes them easier to understand – such as understand – such as hyperglycemia hyperglycemia
Hyper- (more than)Hyper- (more than) Glyc (glucose)Glyc (glucose) -emia (blood)-emia (blood)
ecto- (outside), ecto- (outside), endo- (inside), endo- (inside), -cide (killing), -cide (killing), -tomy, (to cut into), -tomy, (to cut into), bio- (life),bio- (life), -ology (the study of), -ology (the study of), patho- (disease)patho- (disease)
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Weights and MeasuresWeights and Measures Metric system – Metric system –
universally used by the universally used by the scientific community – scientific community – based on the power of based on the power of 1010
Needed to determine Needed to determine and record accurate and record accurate measurementsmeasurements
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ExamplesExamples Weight - Weight - gramgram
kilogram = 2.2 lb; 28.4 grams = 1 ozkilogram = 2.2 lb; 28.4 grams = 1 oz Volume - Volume - literliter
liter = 1.057 qt; 30 milliliters = 1 fluid ounce; 1 liter = 1.057 qt; 30 milliliters = 1 fluid ounce; 1 ml = 20 dropsml = 20 drops
Length - Length - metermetermeter = 39.3 in; 2.54 cm = 1 inmeter = 39.3 in; 2.54 cm = 1 inA little longer than a yard stickA little longer than a yard stick
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Metric systemMetric system milli- 1/1000milli- 1/1000 centi- 1/100centi- 1/100 deci- 1/10deci- 1/10 gram, liter, metergram, liter, meter deka- 1 x 10deka- 1 x 10 hecta- 1 x 100hecta- 1 x 100 kilo- 1 x 1000kilo- 1 x 1000
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Metric – metric ConversionsMetric – metric ConversionsConversions made by moving the decimal Conversions made by moving the decimal
point point Eg .001km = 1m = 1000mmEg .001km = 1m = 1000mm
Base
Gram/Meter/Liter
Kilo Hecta Deka deci Centi Milli
k h da d c m
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Unit conversionUnit conversion1 in = 2.54 cm1 in = 2.54 cmA meter is a little longer than 3 feet (1 A meter is a little longer than 3 feet (1
yard)yard)A liter is about the size of a quartA liter is about the size of a quart1 kg = 2.2 lbs1 kg = 2.2 lbs
10 kg dog weighs 22 lbs10 kg dog weighs 22 lbs
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TemperatureTemperature Americans use the Fahrenheit scaleAmericans use the Fahrenheit scale Science uses Celsius Science uses Celsius Conversion formula is:Conversion formula is:
C = 5/9(F – 32)C = 5/9(F – 32)
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Celsius (centigrade) scaleCelsius (centigrade) scale Temperatures you should know:Temperatures you should know:
0 corresponds to 32 F (freezing)0 corresponds to 32 F (freezing)4 corresponds to 36 F (refrigerator)4 corresponds to 36 F (refrigerator)22 corresponds to 72 F (room temp)22 corresponds to 72 F (room temp)37 corresponds to 98.6 F (body temp)37 corresponds to 98.6 F (body temp)82.2 corresponds to 180 F (cagewash) 82.2 corresponds to 180 F (cagewash) 100 corresponds to 212 F (boiling)100 corresponds to 212 F (boiling)
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ChemistryChemistry The interaction of The interaction of moleculesmolecules and the recombination of and the recombination of
their their atomsatoms Atoms are the fundamental materials which make up Atoms are the fundamental materials which make up
the universethe universe Atoms combine to form moleculesAtoms combine to form molecules
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Important elementsImportant elements Carbon (C)Carbon (C) Oxygen (O)Oxygen (O) Hydrogen (H)Hydrogen (H) Phosphorus (P)Phosphorus (P) Nitrogen (N)Nitrogen (N) Calcium (Ca)Calcium (Ca) Sodium (Na)Sodium (Na) Iron (Fe)Iron (Fe)
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Important MoleculesImportant MoleculesSome elements are naturally joined in Some elements are naturally joined in
pairspairsOxygen OOxygen O2 2 ( 21% of air)( 21% of air)Nitrogen NNitrogen N22
Carbon Dioxide – COCarbon Dioxide – CO22
Water – HWater – H22OOSalt (Sodium Chloride) - NaCl Salt (Sodium Chloride) - NaCl
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Chemistry Prefixes/SuffixesChemistry Prefixes/SuffixesMono - oneMono - oneDi – twoDi – twoTri- ThreeTri- ThreeOxide – OxygenOxide – OxygenHydro – HydrogenHydro – Hydrogen
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BiochemistryBiochemistry The study of chemical reactions in living The study of chemical reactions in living
organismsorganisms HomeostasisHomeostasis- the balance of these chemical - the balance of these chemical
reactions, which is an active state - important for reactions, which is an active state - important for health and for good datahealth and for good data Diet, lack of water, drug overdose, high tempuratures Diet, lack of water, drug overdose, high tempuratures
can affectcan affect Digestion, metabolism, and toxicity all involve Digestion, metabolism, and toxicity all involve
chemical reactions in the bodychemical reactions in the body
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Acids, bases, and pHAcids, bases, and pHAcidified water – small amount of HCL Acidified water – small amount of HCL
(Hydrochloric acid)(Hydrochloric acid)Limits the growth of microorganismsLimits the growth of microorganisms
pH measures the concentration of pH measures the concentration of hydrogen ions hydrogen ions Many hydrogen ions - acidicMany hydrogen ions - acidicFew hydrogen ions – alkaline (basic)Few hydrogen ions – alkaline (basic)Scale 0-14Scale 0-14
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Water – 7 Water – 7 (neutral)(neutral)
Low numbers Low numbers – acidic– acidic
High numbers High numbers - basic- basic
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Acids and basesAcids and basesSubstances with a non-neutral pH can be Substances with a non-neutral pH can be
corrosivecorrosiveWear protective eyewear and glovesWear protective eyewear and glovespH on either end are very corrosivepH on either end are very corrosiveMeasured with a special meter or pH Measured with a special meter or pH
paper which changes color according to paper which changes color according to the pHthe pH
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DilutionsDilutionsReduce the concentration or “strength” of Reduce the concentration or “strength” of
a liquida liquid