Qualitative Data

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”

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”

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”

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”


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”

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”