EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：1.2.5 Practical: Investigating Paper Chromatography Practical: Investigate Paper Chromatography Using Inks & Food Colourings Objective: Investi...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：1.2.4 Interpreting Chromatograms Identifying Mixtures Pure substances will produce only one spot on the chromatogram If two or more substanc...
Polymerase Chain Reaction Every person, with the exception of identical twins, has a unique DNA sequence which can be used to create a DNA profile This is very useful in forensic science as it prov...
Micro-organisms: Decomposition & Nutrient Recycling Dead plants and animals are broken down by microorganisms such as bacteria and fungi These organisms are known as decomposers These decompose...
Determining the Time of Death Forensics is the use of science in the investigation of criminal activities It involves the collection and analysis of evidence from a potential crime scene e.g. the s...
IG化学作为国际课程的基础课程之一，目的是为了帮助国际学生在科学学习方面奠定一定的基础。现如今也是最好的衔接美国，英高，加高，以及国内国际学校的化学课程。那么IG化学课程有哪些知识点？（内含2022真题解...
Evidence of Evolution & the Scientific Community The theory of evolution by natural selection is now widely accepted by the scientific community due to its being supported by a great deal of ev...
Speciation The theory of evolution states that species do not stay the same, but change over time; this can lead to the process of speciation Speciation can be defined as the development of new spe...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：1.2 3 Separation Techniques 、 Simple Distillation This is used to separate a liquid and soluble solid from a solution (e.g., water from a s...
