EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復習筆記：1.4.1 Periodic Table: Basics Arrangement of the Periodic Table There are over 100 chemical elements which have been isolated and identified ...
Entry Routes of Pathogens In order for pathogens to cause disease they need to enter the body There are four main ways in which pathogens can enter Broken skin This provides direct access to the ti...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復習筆記：1.3.2 Calculate Relative Atomic Mass Calculate Relative Atomic Mass The relative atomic mass of each element is calculated from the?m...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復習筆記：1.3.1 Atoms: Definitions & Structure Atoms & Molecules It is important to understand the terms atom and molecule when referring to a...
Structure of Bacteria & Viruses Bacteria Bacteria are small, single-celled?prokaryotes Prokaryotic cells are much?smaller?than eukaryotic cells They also differ from eukaryotic cells in having ...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復習筆記：1.2.5 Practical: Investigating Paper Chromatography Practical: Investigate Paper Chromatography Using Inks & Food Colourings Objective: Investi...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復習筆記：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...
