Learn. What is qualitative data? Qualitative data is data (information about a population or sample of a population) which is not numerical. This could be car colour. Initial data analysis (IDA) is your first step in data analysis. It involves looking through your data, this may be to generate more research questions, to determine whetherContinue reading “Qualitative Data”
Author Archives: Joshua Mills
Evidence for Evolution
Investigate, using secondary sources, evidence in support of Darwin and Wallace’s Theory of Evolution by Natural Selection, including but not limited to: Biochemical evidence, comparative anatomy, comparative embryology, biogeography Techniques used to date fossils and the evidence produced Learn. The theory of evolution by natural selection, as with all theories in science, requires evidence toContinue reading “Evidence for Evolution”
Mass Spec, IR and UV
Learn. You have an unknown sample of a organic compound you made in the lab. It may be the next great drug to treat an elusive disease. But how do you go about determining what molecule you are dealing with? Combustion analysis can be used to determine the empirical formula of an unknown hydrocarbon. ThisContinue reading “Mass Spec, IR and UV”
DNA vs RNA
Learn. It is conventional to write DNA polymer from left to right which is from the 5′ region to the 3′ region. Proteins are synthesized from the 5′ prime region to the 3′ region hence we also write proteins from the N-terminus (or amino terminus) to the C-terminus (or carboxy terminus). Proteins are built fromContinue reading “DNA vs RNA”
Nuclear Magnetic Resonance
Learn. Perhaps the most useful and powerful tool for structural elucidation is nuclear magnetic resonance (NMR). Not only does it allow you to determine the number of a particular atom, it can demonstrate what is bonded to what. Essentially, providing puzzle pieces which you can use to determine the identity of an unknown sample inContinue reading “Nuclear Magnetic Resonance”
Convergent and Divergent Evolution
Explain, using examples, how Darwin and Wallace’s Theory of Evolution by Natural Selection accounts for:
– Convergent evolution
– Divergent evolution
Limiting and Excess Reagents
Learn. When performing quantitative calculations in chemistry it is important to determine what the limiting reagent is and what the excess reagent is. The limiting reagent will be the reactant (one of the chemicals which will be reacting in the reaction) which is going to be fully used up. This means the amount of productContinue reading “Limiting and Excess Reagents”
Beats
Analyse qualitatively and quantitatively the relationships of the wave nature of sound to explain: beats 𝑓beat = |𝑓2 − 𝑓1 | The Doppler effect 𝑓′ = 𝑓 (𝑣wave+𝑣observer) / (𝑣wave−𝑣source) Learn. Beats are the result of two waves of similar frequency interfering with one another. The resultant super position creates patches of constructive interference and patches of deconstructiveContinue reading “Beats”
The Doppler effect
Analyse qualitatively and quantitatively the relationships of the wave nature of sound to explain
Electron Microscope for HSC Biology
An electron microscope lets you see the microscopic world. A world so small it can’t even be seen with light. They need to use electrons to visualise structures such as animal cells and virus’. There are two types of electron microscopes. Scanning electron microscopes (SEM) and transmission electron microscopes (TEM). Learn about the electron microscope.Continue reading “Electron Microscope for HSC Biology”
