- 01.Atomicstructureandtheperiodictable
- 0:0 免费01.Atomicstructure(verysmallele ...
- 0:0 免费02.Developingamodelforatoms
- 0:0 免费03.Atoms,elementsandcompounds
- 0:0 免费04.Modernperiodictableandelectr ...
- 0:0 免费05.Atomicnumberandmassnumber
- 0:0 免费06.Isotopesandrelativeatomicmas ...
- 0:0 免费07.Relativeformulamass
- 0:0 免费08.Developmentoftheperiodictabl ...
- 02.Eukaryoticandprokaryoticcells
- 0:0 免费01.Cells
- 0:0 免费02.Lightmicroscopyobservingandd ...
- 0:0 免费02.Lightmicroscopyobservingandd ...
- 0:0 免费03.Animalcellscommonstructuresa ...
- 0:0 免费04.Plantcellscommonstructuresan ...
- 0:0 免费05.Eukaryoticandprokaryoticorga ...
- 0:0 免费06.Commonstructuresofprokaryoti ...
- 0:0 免费07.Thesizeandscaleofcellsinclud ...
- 03.Particleexplanationsofdensityandpressure
- 0:0 免费01.Calculatingdensityandmeasuri ...
- 0:0 免费02.Measuringdensity
- 0:0 免费03.Pressureinafluid
- 0:0 免费04.Upthrust
- 0:0 免费05.Explainingconvection
- 0:0 免费06.Changesofpressure
- 04.DNAandthegenome
- 0:0 免费01.Thegenome
- 0:0 免费02.ThestructureofDNA
- 0:0 免费03.Thegenome,theenvironmentandp ...
- 05.Structureandbonding
- 0:0 免费01.Whychemicalreactionshappen
- 0:0 免费02.Metallicstructureandproperti ...
- 0:0 免费03.Metalalloys
- 0:0 免费04.Formingionsforionicbonding
- 0:0 免费05.Giantionicstructures
- 0:0 免费06.Determiningionicformulae
- 0:0 免费07.Ionicdiagramsforbinaryionics ...
- 0:0 免费08.Propertiesofgiantionicstruct ...
- 0:0 免费09.Formingcovalentbonds
- 0:0 免费10.Propertiesofcovalentsubstanc ...
- 0:0 免费11.Bondingmodels
- 06.Healthanddisease
- 0:0 免费01.Diseases
- 0:0 免费02.Cardiovasculardisease
- 0:0 免费03.Riskfactorsfornon-communicab ...
- 0:0 免费04.Cancer
- 0:0 免费05.Bacterialandviraldiseasesinh ...
- 0:0 免费06.Fungalandprotistdiseasesinhu ...
- 0:0 免费07.Sexuallytransmittedinfection ...
- 0:0 免费08.PlantdiseasesTMVandroseblack ...
- 07.Measuringandcalculatingmotion
- 0:0 免费01.Differentspeeds(v=st)
- 0:0 免费01.Differentspeeds(v=st)_1
- 0:0 免费02.Measuringinstantaneousspeedp ...
- 0:0 免费03.Measuringinstantaneousspeeda ...
- 0:0 免费04.Displacementandvelocityasvec ...
- 0:0 免费04.Displacementandvelocityasvec ...
- 0:0 免费05.Velocityondisplacement-timeg ...
- 0:0 免费05.Velocityondisplacement-timeg ...
- 0:0 免费06.Calculatingfromdisplacement- ...
- 0:0 免费07.Calculatingacceleration(a=Δ ...
- 0:0 免费08.Measuringaccelerationpractic ...
- 0:0 免费09.Measuringaccelerationanalysi ...
- 0:0 免费10.Velocity-timegraphsaccelerat ...
- 0:0 免费10.Velocity-timegraphsaccelerat ...
- 0:0 免费11.Calculatingfrommotiongraphsi ...
- 0:0 免费12.Motioncalculationsincludingc ...
- 08.Statesofmatter
- 0:0 免费01.Theparticlemodel
- 0:0 免费02.Statechangesfundamentals
- 0:0 免费03.Statechangesevaporationandsu ...
- 0:0 免费04.Predictingstatesofmatterandl ...
- 0:0 免费05.Puresubstance
- 0:0 免费06.Heatingandcoolingcurves
- 0:0
免费06.Heatingandcoolingcurves_1 - 0:0 免费07.Heatingcurvespractical
- 09.Biologicalmoleculesandenzymes
- 0:0 免费01.Biologicalmolecules
- 0:0 免费02.Testsforbiologicalmolecules
- 0:0 免费03.Obtainingtheelementsneededto ...
- 0:0 免费04.Enzymesfunction,structureand ...
- 0:0 免费05.Explainingeffectsofsubstrate ...
- 0:0 免费06.TheeffectofpHontherateofanen ...
- 0:0 免费07.TheeffectofpHontherateofanen ...
- 0:0 免费08.TheeffectofpHontherateofanen ...
- 10.Transportandexchangesurfacesinhumans
- 0:0 免费01.Thehumancirculatorysystem
- 0:0 免费02.Thehumanheartanddoublecircul ...
- 0:0 免费03.Humanbloodcellsandbloodvesse ...
- 0:0 免费04.Microscopyofhumanbloodcellsa ...
- 0:0 免费05.Movingintoandoutoftheblooddi ...
- 0:0 免费06.Diffusionandsurfaceareatovol ...
- 0:0 免费07.Theimportanceofexchangesurfa ...
- 11.Electricfieldsandcircuitcalculations
- 0:0 免费01.Movingelectriccharge
- 0:0 免费02.Linkingcurrent,potentialdiff ...
- 0:0 免费03.Resistanceofawireataconstant ...
- 0:0 免费04.Analysingseriescircuitsinclu ...
- 0:0 免费05.Addingcomponentstoaparallelc ...
- 0:0 免费06.Analysingparallelcircuitsinc ...
- 12.Coordinationandcontrolthehumannervoussystem
- 0:0 免费01.Thehumannervoussystem
- 0:0 免费02.Neuronesandsynapses
- 0:0 免费03.Humanreactiontimepractical
- 0:0 免费04.Thestructureandfunctionofare ...
- 13.Separatingsubstances
- 0:0 免费01.Separatingmixtures(including ...
- 0:0 免费02.Solutions
- 0:0 免费03.Filtration
- 0:0 免费04.Crystallisation
- 0:0 免费05.Chromatographypaper
- 0:0 免费06.Interpretingchromatograms
- 0:0 免费07.Chromatographyseparatingamix ...
- 0:0 免费08.Distillationsimpledistillati ...
- 0:0 免费09.Distillationseparatingamixtu ...
- 0:0 免费10.Distillationfractionaldistil ...
- 0:0 免费11.Potablewater
- 0:0 免费12.Wastewatertreatment
- 0:0 免费13.WatersampleanalysispH
- 0:0 免费14.Watersampleanalysisdissolved ...
- 0:0 免费15.Watersampleanalysisdistillat ...
- 14.Coordinationandcontrolhormonesandthehumanendocrinesystem
- 0:0 免费01.Thehumanendocrinesystem
- 0:0 免费02.Insulinandthecontrolofbloods ...
- 0:0 免费03.Insulin,glucagonandthecontro ...
- 0:0 免费04.Type1andtype2diabetes
- 0:0 免费05.Adrenaline,thyroxineandnegat ...
- 15.Measuringwaves
- 0:0 免费01.Transversewaves
- 0:0 免费02.Representingtransversewaves
- 0:0 免费03.Representinglongitudinalwave ...
- 0:0 免费04.Oscilloscope
- 0:0 免费05.Measuringthespeedofwaterwave ...
- 0:0 免费06.Thewaveequation
- 0:0 免费07.Usingthewavespeedequations
- 0:0 免费08.Measuringwavesinarippletank
- 0:0 免费09.Measuringwavesonastring
- 0:0 免费10.Measuringthespeedofsoundinai ...
- 0:0 免费11.Humanhearing
- 0:0 免费12.ProbingplanetEarth
- 16.Photosynthesisrequirementsandproducts
- 0:0 免费01.Producers,photosynthesisandc ...
- 0:0 免费02.Photosynthesisanendothermicp ...
- 0:0 免费03.Modelsofphotosynthesis
- 0:0 免费04.Therequirementsandproductsof ...
- 17.Calculationsinvolvingmasses
- 0:0 免费01.Threetypesofchemicalreaction
- 0:0 免费02.Conservationofmass
- 0:0 免费03.Balancingequations
- 0:0 免费04.Themole
- 0:0 免费05.Molesandmasses
- 0:0 免费06.Uncertaintiesinmeasurementsc ...
- 0:0 免费07.Representationsofamole
- 0:0 免费08.Massinachemicalreactionusing ...
- 0:0 免费09.Limitingreactants
- 0:0 免费10.Determininganequationfromgiv ...
- 0:0 免费11.Determininganequationexperim ...
- 0:0 免费12.Determininganequationexperim ...
- 18.Inheritance,genotypeandphenotype
- 0:0 免费01.Alleles,genotype,andphenotyp ...
- 0:0 免费02.Modelsofsingle-geneinheritan ...
- 0:0 免费03.Modelsofsingle-geneinheritan ...
- 0:0 免费03.Modelsofsingle-geneinheritan ...
- 0:0 免费04.Theinheritanceofbiologicalse ...
- 19.Energyofmovingobjects
- 0:0 免费01.Workdonecalculations(W=F×s)
- 0:0 免费02.Powercalculations(P=Wt)
- 0:0 免费03.Calculatingefficiency(interm ...
- 0:0 免费04.Calculatingtheenergyofmoving ...
- 0:0 免费05.Theenergyofobjectsinagravita ...
- 0:0 免费06.Calculatingenergychanges-wit ...
- 0:0 免费07.Stretchingaspringpractical
- 0:0 免费08.Stretchingaspringanalysisand ...
- 0:0 免费09.Calculatingtheenergyofspring ...
- 20.Celldivisionmitosisandmeiosis
- 0:0 免费01.Growthinmulticellularorganis ...
- 0:0 免费02.Thecellcycleandcelldivisionm ...
- 0:0 免费03.ThestructureofDNAincludingnu ...
- 0:0 免费04.Errorsincelldivisionandcance ...
- 0:0 免费05.Makinggametesmeiosis
- 21.Makingsalts
- 0:0 免费01.Describingsalts
- 0:0 免费02.Hazardsymbolsandequipment
- 0:0 免费03.Acid-basereactions(carbonate ...
- 0:0 免费04.Chemicalreactionsofacidswith ...
- 0:0 免费05.Concentrationofsolutions
- 0:0 免费06.pHscaleandindicators
- 0:0 免费07.Solubilityrules
- 0:0 免费08.Ionicequationssaltformation
- 0:0 免费09.Makingapuredrysampleofasolub ...
- 0:0 免费10.Adaptingamultistepchemicalpr ...
- 0:0 免费11.ChangeinpHpractical
- 0:0 免费12.Comparingconcentrationwithst ...
- 22.Stemcellsanddifferentiation
- 0:0 免费01.Specialisedcells,unspecialis ...
- 0:0 免费02.Stemcellsinanimals
- 0:0 免费03.Meristemcellsinplants
- 0:0 免费04.Usingstemcellsinmedicinepote ...
- 23.Energyofmovingparticles
- 0:0 免费01.Thermalconductionandinsulati ...
- 0:0 免费02.Effectiveinsulation
- 0:0 免费03.Heatingdifferentsubstances
- 0:0 免费04.Calculatingspecificheatcapac ...
- 0:0 免费05.Measuringspecificheatcapacit ...
- 0:0 免费06.Aheatingcurveforwater
- 0:0 免费07.Specificlatentheat(E=mL)
- 24.Fossilevidence,selectivebreedingandexplainingevolution
- 0:0 免费01.Thefossilrecordprovidesevide ...
- 0:0 免费02.Commonancestorsandtransition ...
- 0:0 免费03.Selectivebreedingandhumanfoo ...
- 0:0 免费04.Theevolutionofnewspecies
- 25.Chemistryofcarbon
- 0:0 免费01.Bondingtocarbonatoms
- 0:0 免费02.Diamondandgraphite
- 0:0 免费03.Usingmodelstoexplainstatecha ...
- 0:0 免费04.Grapheneandfullerenes
- 0:0 免费05.Discoveryandusesofcarbonnano ...
- 0:0 免费06.Bonding,structureandproperti ...
- 0:0 免费07.Hydrocarbons
- 26.Livingorganismsandtheirenvironments
- 0:0 免费01.Componentsofanecosystem
- 0:0 免费02.Measuringthesizeanddistribut ...
- 0:0 免费03.Estimatingpopulationsizeusin ...
- 0:0 免费04.Estimatingpopulationsizeandd ...
- 0:0 免费05.Competitionandadaptationsine ...
- 0:0 免费06.Theroleofmicroorganismsindec ...
- 0:0 免费07.Materialcyclesthecarboncycle
- 0:0 免费08.Materialcyclesthewatercycle
- 27.Circuitcomponents
- 0:0 免费01.Measuringtheresistanceofafil ...
- 0:0 免费02.Resistanceofahotmetal
- 0:0 免费03.Measuringtheresistanceofadio ...
- 0:0 免费04.InterpretingI–Vgraphs
- 0:0 免费05.Potentialdividercircuits
- 0:0 免费06.LDRsandthermistors
- 28.Energychangesinreactions
- 0:0 免费01.Energychangesinreactions
- 0:0 免费02.Energychangesdisplacementpra ...
- 0:0 免费03.Energychangesneutralisationp ...
- 0:0 免费04.Reactionprofiles
- 0:0 免费05.Breakingandmakingbonds
- 0:0 免费06.Breakingandmakingbondsusingb ...